openrisc: convert makefiles to Kbuild style
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
diff --git a/arch/openrisc/cpu/Makefile b/arch/openrisc/cpu/Makefile
index 863d9b3..fc47d66 100644
--- a/arch/openrisc/cpu/Makefile
+++ b/arch/openrisc/cpu/Makefile
@@ -5,27 +5,5 @@
# SPDX-License-Identifier: GPL-2.0+
#
-include $(TOPDIR)/config.mk
-
-LIB = $(obj)lib$(CPU).o
-
-START = start.o
-COBJS-y = cache.o cpu.o exceptions.o interrupts.o
-
-SRCS := $(START:.o=.S) $(COBJS-y:.o=.c)
-OBJS := $(addprefix $(obj),$(COBJS-y))
-START := $(addprefix $(obj),$(START))
-
-all: $(obj).depend $(START) $(LIB)
-
-$(LIB): $(OBJS)
- $(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+extra-y = start.o
+obj-y = cache.o cpu.o exceptions.o interrupts.o