board: powerpc: convert makefiles to Kbuild style

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Kim Phillips <kim.phillips@freescale.com>
Cc: York Sun <yorksun@freescale.com>
Cc: Stefan Roese <sr@denx.de>
diff --git a/board/xes/common/Makefile b/board/xes/common/Makefile
index 2e5f1c5..65d321a 100644
--- a/board/xes/common/Makefile
+++ b/board/xes/common/Makefile
@@ -5,34 +5,10 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-ifneq ($(OBJTREE),$(SRCTREE))
-$(shell mkdir -p $(obj)board/$(VENDOR)/common)
-endif
-
-LIB	= $(obj)lib$(VENDOR).o
-
-COBJS-$(CONFIG_FSL_PCI_INIT)	+= fsl_8xxx_pci.o
-COBJS-$(CONFIG_MPC8572)		+= fsl_8xxx_clk.o
-COBJS-$(CONFIG_MPC86xx)		+= fsl_8xxx_clk.o
-COBJS-$(CONFIG_P2020)		+= fsl_8xxx_clk.o
-COBJS-$(CONFIG_MPC85xx)		+= fsl_8xxx_misc.o board.o
-COBJS-$(CONFIG_MPC86xx)		+= fsl_8xxx_misc.o board.o
-COBJS-$(CONFIG_NAND_ACTL)	+= actl_nand.o
-
-SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y))
-SOBJS	:= $(addprefix $(obj),$(SOBJS))
-
-$(LIB):	$(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-$(CONFIG_FSL_PCI_INIT)	+= fsl_8xxx_pci.o
+obj-$(CONFIG_MPC8572)		+= fsl_8xxx_clk.o
+obj-$(CONFIG_MPC86xx)		+= fsl_8xxx_clk.o
+obj-$(CONFIG_P2020)		+= fsl_8xxx_clk.o
+obj-$(CONFIG_MPC85xx)		+= fsl_8xxx_misc.o board.o
+obj-$(CONFIG_MPC86xx)		+= fsl_8xxx_misc.o board.o
+obj-$(CONFIG_NAND_ACTL)	+= actl_nand.o