Clean up makefile

Change-Id: I739c9f4994e9ede361448deef07f534b46fc1780

Author: tdmcyngn

Makefile

@@ -192,8 +192,8 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 # Default value for CROSS_COMPILE is not to prefix executables
 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 export KBUILD_BUILDHOST := $(SUBARCH)
-ARCH		?= arm
-CROSS_COMPILE	?= /home/opensource.m/toolchains/arm-eabi-4.7/bin/arm-eabi-
+ARCH		?= $(SUBARCH)
+CROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
 
 # Architecture as present in compile.h
 UTS_MACHINE 	:= $(ARCH)