sh: change to new flag variable

Replace EXTRA_CFLAGS with ccflags-y.

Signed-off-by: matt mooney <mfm@muteddisk.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/lib/Makefile b/arch/sh/lib/Makefile
index dab4d21..7b95f29 100644
--- a/arch/sh/lib/Makefile
+++ b/arch/sh/lib/Makefile
@@ -30,4 +30,4 @@
 lib-$(CONFIG_MCOUNT)		+= mcount.o
 lib-y				+= $(memcpy-y) $(memset-y) $(udivsi3-y)
 
-EXTRA_CFLAGS += -Werror
+ccflags-y := -Werror