[2.6 patch] powerpc: proper defconfig for crosscompiles

The trick for finding the right defconfig is neat, but you forgot to 
provide an i686_defconfig.  ;-)

More seriously, cross compiling the defconfig is often useful, e.g. for 
testing the compilation of patches that touch multiple architectures, 
and this patch therefore chooses g5_defconfig if $(CROSS_COMPILE) is 
non-empty.

Signed-off-by: Adrian Bunk <bunk@kernel.org>

---
0b0e6e0e3a16f48348cb9c40ef1bb55ef42f92eb 

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 2065138..a39bac4 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile

@@ -35,7 +35,11 @@ endif
 
 export CROSS32CC CROSS32AS CROSS32LD CROSS32AR CROSS32OBJCOPY
 
+ifeq ($(CROSS_COMPILE),)
 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
+else
+KBUILD_DEFCONFIG := g5_defconfig
+endif
 
 ifeq ($(CONFIG_PPC64),y)
 OLDARCH	:= ppc64