[lk] Do not force cortex targets to be compiled as arm11

Change-Id: If9649aadcd1b18b8adcba68e51f25a9483acc89d
diff --git a/arch/arm/rules.mk b/arch/arm/rules.mk
index 20557c7..6f56edd 100644
--- a/arch/arm/rules.mk
+++ b/arch/arm/rules.mk
@@ -104,10 +104,6 @@
 # XXX test for EABI better than this
 # eabi compilers dont need this
 THUMBINTERWORK:=
-else
-
-# XXX hack to work around lack of cortex support in regular compilers
-CFLAGS := $(subst cortex-a8,arm1136jf-s,$(CFLAGS))
 endif
 
 CFLAGS += $(THUMBINTERWORK)