MAINTAINERS: add arch/powerpc/platforms/85xx/ to the 85xx entry

Cc: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

MAINTAINERS

@@ -3904,6 +3904,7 @@ W:	http://www.penguinppc.org/
 L:	linuxppc-dev@lists.ozlabs.org
 S:	Maintained
 F:	arch/powerpc/platforms/83xx/
+F:	arch/powerpc/platforms/85xx/
 
 LINUX FOR POWERPC PA SEMI PWRFICIENT
 M:	Olof Johansson <olof@lixom.net>