Compile assembly files with -DDEBUG flag

Change-Id: Ic6cf19402a0936161baf6b91bf75d64d95269a3c
diff --git a/Makefile b/Makefile
index b48fbf5..7938318 100644
--- a/Makefile
+++ b/Makefile
@@ -131,7 +131,8 @@
 				${PLAT_INCLUDES}
 
 ASFLAGS			+= 	-nostdinc -ffreestanding -Wa,--fatal-warnings	\
-				-mgeneral-regs-only -D__ASSEMBLY__ ${INCLUDES}
+				-mgeneral-regs-only -D__ASSEMBLY__ ${INCLUDES}	\
+				-DDEBUG=${DEBUG}
 CFLAGS			:= 	-nostdinc -pedantic -ffreestanding -Wall	\
 				-Werror -mgeneral-regs-only -std=c99 -c -Os	\
 				-DDEBUG=${DEBUG} ${INCLUDES} ${CFLAGS}