[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>

arch/powerpc/.gitignore

+include

arch/powerpc/boot/.gitignore

@@ -19,9 +19,15 @@ kernel-vmlinux.strip.gz
 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

arch/ppc/.gitignore

+include

arch/ppc/boot/images/.gitignore

+sImage
+vmapus
+vmlinux*
+miboot*
+zImage*
+uImage

arch/ppc/boot/lib/.gitignore

+inffast.c
+inflate.c
+inftrees.c

arch/ppc/boot/utils/.gitignore

+mkprep
+mkbugboot
+mktree