fix ARCH_SUFFIX for mips64{,el}r2

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 35688

rules.mk

@@ -60,7 +60,7 @@ ifneq ($(filter -march=armv%,$(TARGET_OPTIMIZATION)),)
   ARCH_SUFFIX:=_$(patsubst -march=arm%,%,$(filter -march=armv%,$(TARGET_OPTIMIZATION)))
   GCC_ARCH:=$(patsubst -march=%,%,$(filter -march=armv%,$(TARGET_OPTIMIZATION)))
 endif
-ifneq ($(findstring -mips32r2,$(TARGET_OPTIMIZATION)),)
+ifneq ($(filter -mips%r2,$(TARGET_OPTIMIZATION)),)
   ARCH_SUFFIX:=_r2
 endif
 ifdef CONFIG_HAS_SPE_FPU