don't replace powerpc arch with ppc

'powerpc' is a valid arch for the LINUX_KARCH variable, but the build
system unconditionally replaces LIUNUX_KARCH=powerpc with
LINUX_KARCH=ppc.

This change only does the replacement if LINUX_KARCH isn't set. This
allows us to use the powerpc architecture.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

SVN-Revision: 9405

include/kernel.mk

@@ -51,13 +51,14 @@ endif
 ifneq (,$(findstring uml,$(BOARD)))
   LINUX_KARCH:=um
 else
+  ifeq (,$(LINUX_KARCH))
     LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
 	  -e 's/mipsel/mips/' \
 	  -e 's/mipseb/mips/' \
-	-e 's/powerpc/ppc/' \
 	  -e 's/sh[234]/sh/' \
 	  -e 's/armeb/arm/' \
     )
+  endif
 endif
 
 

target/linux/amcc/Makefile

@@ -12,6 +12,7 @@ BOARDNAME:=AMCC Taishan
 FEATURES:=jffs2
 
 LINUX_VERSION:=2.6.21.5
+LINUX_KARCH:=ppc
 
 include $(INCLUDE_DIR)/target.mk
 

target/linux/magicbox/Makefile

@@ -12,6 +12,7 @@ BOARDNAME:=Magicbox
 FEATURES:=squashfs jffs2
 
 LINUX_VERSION:=2.6.22.4
+LINUX_KARCH:=ppc
 
 include $(INCLUDE_DIR)/target.mk