armv7: convert makefiles to Kbuild style

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/arch/arm/cpu/armv7/exynos/Makefile b/arch/arm/cpu/armv7/exynos/Makefile
index eb1633f..e207bd6 100644
--- a/arch/arm/cpu/armv7/exynos/Makefile
+++ b/arch/arm/cpu/armv7/exynos/Makefile
@@ -5,34 +5,12 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(SOC).o
-
-COBJS-y	+= clock.o power.o soc.o system.o pinmux.o tzpc.o
+obj-y	+= clock.o power.o soc.o system.o pinmux.o tzpc.o
 
 ifdef CONFIG_SPL_BUILD
-COBJS-$(CONFIG_EXYNOS5)	+= clock_init_exynos5.o
-COBJS-$(CONFIG_EXYNOS5)	+= dmc_common.o dmc_init_ddr3.o
-COBJS-$(CONFIG_EXYNOS4210)+= dmc_init_exynos4.o clock_init_exynos4.o
-COBJS-y	+= spl_boot.o
-COBJS-y	+= lowlevel_init.o
+obj-$(CONFIG_EXYNOS5)	+= clock_init_exynos5.o
+obj-$(CONFIG_EXYNOS5)	+= dmc_common.o dmc_init_ddr3.o
+obj-$(CONFIG_EXYNOS4210)+= dmc_init_exynos4.o clock_init_exynos4.o
+obj-y	+= spl_boot.o
+obj-y	+= lowlevel_init.o
 endif
-
-COBJS   := $(COBJS-y)
-SRCS	:= $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
-
-all:	 $(obj).depend $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################