powerpc/Makefiles: Change to new flag variables

Replace EXTRA_CFLAGS with ccflags-y and EXTRA_AFLAGS with asflags-y.

Signed-off-by: matt mooney <mfm@muteddisk.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/math-emu/Makefile

@@ -15,4 +15,4 @@ obj-$(CONFIG_SPE)		+= math_efp.o
 CFLAGS_fabs.o = -fno-builtin-fabs
 CFLAGS_math.o = -fno-builtin-fabs
 
-EXTRA_CFLAGS = -I. -Iinclude/math-emu -w
+ccflags-y = -I. -Iinclude/math-emu -w