MIPS support to *.mk files and envsetup.sh

Change-Id: Iba4d046e3202524b29cfe32980927f8cc0aa8496
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Raghu Gandham <raghu@mips.com>
diff --git a/core/envsetup.mk b/core/envsetup.mk
index 74e9100..ce222a9 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -33,7 +33,7 @@
 
 # ---------------------------------------------------------------
 # Set up configuration for host machine.  We don't do cross-
-# compiles except for arm, so the HOST is whatever we are
+# compiles except for arm/mips, so the HOST is whatever we are
 # running on
 
 UNAME := $(shell uname -sm)
@@ -124,13 +124,10 @@
 # Set up configuration for target machine.
 # The following must be set:
 # 		TARGET_OS = { linux }
-# 		TARGET_ARCH = { arm | x86 }
+# 		TARGET_ARCH = { arm | x86 | mips }
 
-
-ifeq ($(TARGET_ARCH),)
-TARGET_ARCH := arm
-endif
 TARGET_OS := linux
+# TARGET_ARCH should be set by BoardConfig.mk and will be checked later
 
 # the target build type defaults to release
 ifneq ($(TARGET_BUILD_TYPE),debug)