[ARM] 4471/1: Compile the uncompressing code with -fno-builtin

This is to avoid a compiler warning for overriding the built-in "putc"
function.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index a1f1691..6b8cbd6 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -73,7 +73,7 @@
 
 targets       := vmlinux vmlinux.lds piggy.gz piggy.o font.o font.c \
 		 head.o misc.o $(OBJS)
-EXTRA_CFLAGS  := -fpic
+EXTRA_CFLAGS  := -fpic -fno-builtin
 EXTRA_AFLAGS  :=
 
 # Supply ZRELADDR, INITRD_PHYS and PARAMS_PHYS to the decompressor via