[XFS] Remove spin.h

remove spinlock init abstraction macro in spin.h, remove the callers, and
remove the file. Move no-op spinlock_destroy to xfs_linux.h Cleanup
spinlock locals in xfs_mount.c

SGI-PV: 970382
SGI-Modid: xfs-linux-melb:xfs-kern:29751a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 44f0216..f584467 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -68,7 +68,7 @@
 	extern kmem_zone_t	*xfs_dabuf_zone;
 #ifdef XFS_DABUF_DEBUG
 	extern spinlock_t        xfs_dabuf_global_lock;
-	spinlock_init(&xfs_dabuf_global_lock, "xfsda");
+	spin_lock_init(&xfs_dabuf_global_lock);
 #endif
 
 	/*