ppc64: Use arch/powerpc/platforms/powermac for powermac build.
tree3fce91fba1ee65ff00e927cca981980eb07f3019
-rw-r--r-- 18693 COPYING
-rw-r--r-- 89223 CREDITS
drwxr-xr-x - Documentation
-rw-r--r-- 1258 Kbuild
-rw-r--r-- 60831 MAINTAINERS
-rw-r--r-- 43384 Makefile
-rw-r--r-- 14755 README
-rw-r--r-- 3065 REPORTING-BUGS
drwxr-xr-x - arch
drwxr-xr-x - crypto
drwxr-xr-x - drivers
drwxr-xr-x - fs
drwxr-xr-x - include
drwxr-xr-x - init
drwxr-xr-x - ipc
drwxr-xr-x - kernel
drwxr-xr-x - lib
drwxr-xr-x - mm
drwxr-xr-x - net
drwxr-xr-x - scripts
drwxr-xr-x - security
drwxr-xr-x - sound
drwxr-xr-x - usr