arm: enable libgcc build for SPL

Enable the building of private libgcc for SPL

Signed-off-by: Allen Martin <amartin@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/lib/Makefile

@@ -26,7 +26,6 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(ARCH).o
 LIBGCC	= $(obj)libgcc.o
 
-ifndef CONFIG_SPL_BUILD
 GLSOBJS	+= _ashldi3.o
 GLSOBJS	+= _ashrdi3.o
 GLSOBJS	+= _divsi3.o
@@ -37,6 +36,7 @@ GLSOBJS	+= _umodsi3.o
 
 GLCOBJS	+= div0.o
 
+ifndef CONFIG_SPL_BUILD
 COBJS-y	+= board.o
 COBJS-y	+= bootm.o
 COBJS-$(CONFIG_SYS_L2_PL310) += cache-pl310.o