[PATCH] m32r: enable asm code optimization

Add -O2 option to AFLAGS to enable asm code optimization for m32r.

On m32r gas, "-m32r2 -O" option enables assembler's parallel code
generation optimization for M32R2 ISA as a default.  So, "-no-parallel"
option is required explicitly for a cpu core with single instuction
issuing, for example, VDEC2.
Signed-off-by: NHirokazu Takata <takata@linux-m32r.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/m32r/Makefile

@@ -12,14 +12,14 @@ CFLAGS_MODULE += -mmodel=large
 
 ifdef CONFIG_CHIP_VDEC2
 cflags-$(CONFIG_ISA_M32R2)	+= -DNO_FPU -Wa,-bitinst
-aflags-$(CONFIG_ISA_M32R2)	+= -DNO_FPU -Wa,-bitinst
+aflags-$(CONFIG_ISA_M32R2)	+= -DNO_FPU -O2 -Wa,-bitinst -Wa,-no-parallel
 else
 cflags-$(CONFIG_ISA_M32R2)	+= -DNO_FPU -m32r2
-aflags-$(CONFIG_ISA_M32R2)	+= -DNO_FPU -m32r2
+aflags-$(CONFIG_ISA_M32R2)	+= -DNO_FPU -m32r2 -O2
 endif
 
 cflags-$(CONFIG_ISA_M32R)	+= -DNO_FPU
-aflags-$(CONFIG_ISA_M32R)	+= -DNO_FPU -Wa,-no-bitinst
+aflags-$(CONFIG_ISA_M32R)	+= -DNO_FPU -O2 -Wa,-no-bitinst
 
 CFLAGS += $(cflags-y)
 AFLAGS += $(aflags-y)