cris: posix_types.h, include asm-generic/posix_types.h

Without that I cannot build anything:
In file included from include/linux/page-flags.h:8:0,
                 from kernel/bounds.c:9:
include/linux/types.h:25:1: error: unknown type name '__kernel_ino_t'
include/linux/types.h:29:1: error: unknown type name '__kernel_off_t'
...

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Mikael Starvik <starvik@axis.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: linux-cris-kernel@axis.com