kbuild: rename OBJTREE to objtree

Prior to Kbuild, $(OBJTREE) was used for pointing to the
top of build directory with absolute path.

In Kbuild style, $(objtree) is used instead.
This commit renames OBJTREE to objtree and delete the
defition of OBJTREE.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/Makefile b/Makefile
index a8ca5e9..fa1e0ae 100644
--- a/Makefile
+++ b/Makefile
@@ -165,10 +165,9 @@
 
 export srctree objtree VPATH
 
-OBJTREE		:= $(objtree)
-SPLTREE		:= $(OBJTREE)/spl
-TPLTREE		:= $(OBJTREE)/tpl
-export	OBJTREE SPLTREE TPLTREE
+SPLTREE		:= $(objtree)/spl
+TPLTREE		:= $(objtree)/tpl
+export	SPLTREE TPLTREE
 
 MKCONFIG	:= $(srctree)/mkconfig
 export MKCONFIG
diff --git a/arch/m68k/cpu/mcf52x2/config.mk b/arch/m68k/cpu/mcf52x2/config.mk
index ebf75e6..34ad99e 100644
--- a/arch/m68k/cpu/mcf52x2/config.mk
+++ b/arch/m68k/cpu/mcf52x2/config.mk
@@ -7,7 +7,7 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-cfg=$(shell grep configs $(OBJTREE)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
+cfg=$(shell grep configs $(objtree)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
 is5208:=$(shell grep CONFIG_M5208 $(srctree)/include/$(cfg))
 is5249:=$(shell grep CONFIG_M5249 $(srctree)/include/$(cfg))
 is5253:=$(shell grep CONFIG_M5253 $(srctree)/include/$(cfg))
diff --git a/arch/m68k/cpu/mcf532x/config.mk b/arch/m68k/cpu/mcf532x/config.mk
index 0a248c3..af94354 100644
--- a/arch/m68k/cpu/mcf532x/config.mk
+++ b/arch/m68k/cpu/mcf532x/config.mk
@@ -7,7 +7,7 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-cfg=$(shell grep configs $(OBJTREE)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
+cfg=$(shell grep configs $(objtree)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
 is5301x:=$(shell grep CONFIG_MCF5301x $(srctree)/include/$(cfg))
 is532x:=$(shell grep CONFIG_MCF532x $(srctree)/include/$(cfg))
 
diff --git a/arch/m68k/cpu/mcf5445x/config.mk b/arch/m68k/cpu/mcf5445x/config.mk
index 2f310a5..5fd0d4d 100644
--- a/arch/m68k/cpu/mcf5445x/config.mk
+++ b/arch/m68k/cpu/mcf5445x/config.mk
@@ -9,7 +9,7 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-cfg=$(shell grep configs $(OBJTREE)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
+cfg=$(shell grep configs $(objtree)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
 is5441x:=$(shell grep CONFIG_MCF5441x $(srctree)/include/$(cfg))
 
 ifneq (,$(findstring CONFIG_MCF5441x,$(is5441x)))
diff --git a/arch/powerpc/cpu/ppc4xx/config.mk b/arch/powerpc/cpu/ppc4xx/config.mk
index 907a3dd..102f069 100644
--- a/arch/powerpc/cpu/ppc4xx/config.mk
+++ b/arch/powerpc/cpu/ppc4xx/config.mk
@@ -7,7 +7,7 @@
 
 PLATFORM_CPPFLAGS += -DCONFIG_4xx -mstring -msoft-float
 
-cfg=$(shell grep configs $(OBJTREE)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
+cfg=$(shell grep configs $(objtree)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
 is440:=$(shell grep CONFIG_440 $(srctree)/include/$(cfg))
 
 ifneq (,$(findstring CONFIG_440,$(is440)))
diff --git a/mkconfig b/mkconfig
index 17ff298..cd911a9 100755
--- a/mkconfig
+++ b/mkconfig
@@ -104,9 +104,9 @@
 # Create link to architecture specific headers
 #
 if [ -n "$KBUILD_SRC" ] ; then
-	mkdir -p ${OBJTREE}/include
+	mkdir -p ${objtree}/include
 	LNPREFIX=${srctree}/arch/${arch}/include/asm/
-	cd ${OBJTREE}/include
+	cd ${objtree}/include
 	mkdir -p asm
 else
 	cd arch/${arch}/include
diff --git a/nand_spl/board/freescale/mpc8315erdb/Makefile b/nand_spl/board/freescale/mpc8315erdb/Makefile
index e3c87cf..f4e7854 100644
--- a/nand_spl/board/freescale/mpc8315erdb/Makefile
+++ b/nand_spl/board/freescale/mpc8315erdb/Makefile
@@ -8,7 +8,7 @@
 
 PAD_TO := 0xfff04000
 
-nandobj	:= $(OBJTREE)/nand_spl/
+nandobj	:= $(objtree)/nand_spl/
 
 LDSCRIPT= $(srctree)/nand_spl/board/$(BOARDDIR)/u-boot.lds
 LDFLAGS := -T $(nandobj)u-boot.lds -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) \
diff --git a/nand_spl/board/freescale/mpc8536ds/Makefile b/nand_spl/board/freescale/mpc8536ds/Makefile
index eefa44d..c639b12 100644
--- a/nand_spl/board/freescale/mpc8536ds/Makefile
+++ b/nand_spl/board/freescale/mpc8536ds/Makefile
@@ -10,7 +10,7 @@
 CONFIG_SYS_TEXT_BASE_SPL := 0xfff00000
 PAD_TO := 0xfff01000
 
-nandobj	:= $(OBJTREE)/nand_spl/
+nandobj	:= $(objtree)/nand_spl/
 
 LDSCRIPT= $(srctree)/$(CPUDIR)/u-boot-nand_spl.lds
 LDFLAGS := -T $(nandobj)u-boot-nand_spl.lds -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) \
diff --git a/nand_spl/board/freescale/mpc8569mds/Makefile b/nand_spl/board/freescale/mpc8569mds/Makefile
index eefa44d..c639b12 100644
--- a/nand_spl/board/freescale/mpc8569mds/Makefile
+++ b/nand_spl/board/freescale/mpc8569mds/Makefile
@@ -10,7 +10,7 @@
 CONFIG_SYS_TEXT_BASE_SPL := 0xfff00000
 PAD_TO := 0xfff01000
 
-nandobj	:= $(OBJTREE)/nand_spl/
+nandobj	:= $(objtree)/nand_spl/
 
 LDSCRIPT= $(srctree)/$(CPUDIR)/u-boot-nand_spl.lds
 LDFLAGS := -T $(nandobj)u-boot-nand_spl.lds -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) \
diff --git a/nand_spl/board/freescale/mpc8572ds/Makefile b/nand_spl/board/freescale/mpc8572ds/Makefile
index eefa44d..c639b12 100644
--- a/nand_spl/board/freescale/mpc8572ds/Makefile
+++ b/nand_spl/board/freescale/mpc8572ds/Makefile
@@ -10,7 +10,7 @@
 CONFIG_SYS_TEXT_BASE_SPL := 0xfff00000
 PAD_TO := 0xfff01000
 
-nandobj	:= $(OBJTREE)/nand_spl/
+nandobj	:= $(objtree)/nand_spl/
 
 LDSCRIPT= $(srctree)/$(CPUDIR)/u-boot-nand_spl.lds
 LDFLAGS := -T $(nandobj)u-boot-nand_spl.lds -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) \
diff --git a/nand_spl/board/freescale/p1023rds/Makefile b/nand_spl/board/freescale/p1023rds/Makefile
index f5e567c..38f6726 100644
--- a/nand_spl/board/freescale/p1023rds/Makefile
+++ b/nand_spl/board/freescale/p1023rds/Makefile
@@ -6,7 +6,7 @@
 
 PAD_TO := 0xfff01000
 
-nandobj	:= $(OBJTREE)/nand_spl/
+nandobj	:= $(objtree)/nand_spl/
 
 LDSCRIPT= $(srctree)/$(CPUDIR)/u-boot-nand_spl.lds
 LDFLAGS := -T $(nandobj)u-boot-nand_spl.lds -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) \
diff --git a/nand_spl/board/freescale/p1_p2_rdb/Makefile b/nand_spl/board/freescale/p1_p2_rdb/Makefile
index eefa44d..c639b12 100644
--- a/nand_spl/board/freescale/p1_p2_rdb/Makefile
+++ b/nand_spl/board/freescale/p1_p2_rdb/Makefile
@@ -10,7 +10,7 @@
 CONFIG_SYS_TEXT_BASE_SPL := 0xfff00000
 PAD_TO := 0xfff01000
 
-nandobj	:= $(OBJTREE)/nand_spl/
+nandobj	:= $(objtree)/nand_spl/
 
 LDSCRIPT= $(srctree)/$(CPUDIR)/u-boot-nand_spl.lds
 LDFLAGS := -T $(nandobj)u-boot-nand_spl.lds -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) \
diff --git a/nand_spl/board/sheldon/simpc8313/Makefile b/nand_spl/board/sheldon/simpc8313/Makefile
index 664301c..657f65f 100644
--- a/nand_spl/board/sheldon/simpc8313/Makefile
+++ b/nand_spl/board/sheldon/simpc8313/Makefile
@@ -9,7 +9,7 @@
 
 include $(srctree)/$(src)/config.mk
 
-nandobj	:= $(OBJTREE)/nand_spl/
+nandobj	:= $(objtree)/nand_spl/
 
 LDSCRIPT= $(srctree)/nand_spl/board/$(BOARDDIR)/u-boot.lds
 LDFLAGS := -T $(nandobj)u-boot.lds -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) \
diff --git a/spl/Makefile b/spl/Makefile
index b89a579..be5fd3b 100644
--- a/spl/Makefile
+++ b/spl/Makefile
@@ -166,7 +166,7 @@
 # on the fly.
 LDPPFLAGS += \
 	-include $(srctree)/include/u-boot/u-boot.lds.h \
-	-include $(OBJTREE)/include/config.h \
+	-include $(objtree)/include/config.h \
 	-DCPUDIR=$(CPUDIR) \
 	$(shell $(LD) --version | \
 	  sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
@@ -197,9 +197,9 @@
 VAR_SIZE_PARAM =
 endif
 $(obj)/$(BOARD)-spl.bin: $(obj)/u-boot-spl.bin
-	$(if $(wildcard $(OBJTREE)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl),\
-	$(OBJTREE)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl,\
-	$(OBJTREE)/tools/mkexynosspl) $(VAR_SIZE_PARAM) $< $@
+	$(if $(wildcard $(objtree)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl),\
+	$(objtree)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl,\
+	$(objtree)/tools/mkexynosspl) $(VAR_SIZE_PARAM) $< $@
 endif
 
 quiet_cmd_objcopy = OBJCOPY $@