staging: lustre: include: linux: libcfs: linux: Used "linux" instead of "asm".

This patch fixes "Use #include <linux/uaccess.h> instead of
<asm/uaccess.h"> checkpatch.pl warning in libcfs.h

Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>