[POWERPC] Add files build to .gitignore

Mostly taken from corresponding Makefile's make-clean rule.

Tested by (cross)compiling for $ARCH PPC and POWERPC and checking
output of git-status.

Signed-off-by: Rutger Nijlunsing <git-commit@tux.tmfweb.nl>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/boot/.gitignore b/arch/powerpc/boot/.gitignore
index 590e72f..0734b2f 100644
--- a/arch/powerpc/boot/.gitignore
+++ b/arch/powerpc/boot/.gitignore
@@ -19,9 +19,15 @@
 mktree
 uImage
 zImage
-zImage.vmode
+zImage.chrp
+zImage.coff
 zImage.coff.lds
 zImage.lds
+zImage.miboot
+zImage.pmac
+zImage.pseries
+zImage.sandpoint
+zImage.vmode
 zconf.h
 zlib.h
 zutil.h