[XFS] Move platform specific mount option parse out of core XFS code

Mount option parsing is platform specific. Move it out of core code into
the platform specific superblock operation file.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30012a
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

fs/xfs/xfs_vfsops.h

@@ -16,9 +16,6 @@ int xfs_mntupdate(struct xfs_mount *mp, int *flags,
 int xfs_root(struct xfs_mount *mp, bhv_vnode_t **vpp);
 int xfs_sync(struct xfs_mount *mp, int flags);
 int xfs_vget(struct xfs_mount *mp, bhv_vnode_t **vpp, struct xfs_fid *xfid);
-int xfs_parseargs(struct xfs_mount *mp, char *options,
-		struct xfs_mount_args *args, int update);
-int xfs_showargs(struct xfs_mount *mp, struct seq_file *m);
 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
 		int lnnum);
 void xfs_attr_quiesce(struct xfs_mount *mp);