[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_alloc.c b/fs/xfs/xfs_alloc.c
index c23fb2a..ea6aa60 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -2206,7 +2206,7 @@
 			be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNOi]);
 		pag->pagf_levels[XFS_BTNUM_CNTi] =
 			be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNTi]);
-		spinlock_init(&pag->pagb_lock, "xfspagb");
+		spin_lock_init(&pag->pagb_lock);
 		pag->pagb_list = kmem_zalloc(XFS_PAGB_NUM_SLOTS *
 					sizeof(xfs_perag_busy_t), KM_SLEEP);
 		pag->pagf_init = 1;