better tuning for xscale that copes with generally available toolchains

Rules.mak

@@ -147,8 +147,8 @@ ifeq ($(strip $(TARGET_ARCH)),arm)
 	CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
 	CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 	CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
-	CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110) \
-				$(call check_gcc,-march=armv5te,-march=armv4 -Wa$(comma)-mxscale)
+	CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
+	CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
 endif
 
 ifeq ($(strip $(TARGET_ARCH)),sh)