ARM: Add SPL target to arm1136

The patch adds SPL for the arm1136 architecture and
inserts SPL (the produced binary) to clobber target
in the main Makefile.

Signed-off-by: Stefano Babic <sbabic@denx.de>

Makefile

@@ -844,6 +844,7 @@ clobber:	tidy
 	@rm -f $(obj)nand_spl/{u-boot.lds,u-boot-nand_spl.lds,u-boot-spl,u-boot-spl.map,System.map}
 	@rm -f $(obj)spl/{u-boot-spl,u-boot-spl.bin,u-boot-spl.lds,u-boot-spl.map}
 	@rm -f $(obj)MLO
+	@rm -f $(obj)SPL
 	@rm -f $(obj)tools/xway-swap-bytes
 	@rm -f $(obj)arch/powerpc/cpu/mpc824x/bedbug_603e.c
 	@rm -f $(obj)arch/powerpc/cpu/mpc83xx/ddr-gen?.c

arch/arm/cpu/arm1136/config.mk

@@ -31,3 +31,6 @@ PLATFORM_CPPFLAGS += -march=armv5
 # =========================================================================
 PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
 PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
+ifdef CONFIG_SPL_BUILD
+ALL-y	+= $(OBJTREE)/SPL
+endif