LU-3963 libcfs: convert ptlrpc,quota plus others to linux atomics

LU-3963 libcfs: convert ptlrpc,quota plus others to linux atomics

This patch converts all cfs_atomic primitives in
liblustre, osp, ptlrpc and quota.

Signed-off-by: Liu Xuezhao <xuezhao.liu@emc.com>
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: James Simmons <uja.ornl@gmail.com>
Change-Id: If21fdd31441d4b2a23df8cbd9db8187bb827ab2f
Reviewed-on: http://review.whamcloud.com/7077
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Yang Sheng <yang.sheng@intel.com>