xfs: convert xfs_cmn_err to xfs_alert_tag

Continue the conversion of the old cmn_err interface be converting
all the conditional panic tag errors to xfs_alert_tag() and then
removing xfs_cmn_err().

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 8a0f044..812646f 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -105,7 +105,7 @@
 	xfs_inode_t	*ip,
 	xfs_bmbt_irec_t	*imap)
 {
-	xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount,
+	xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO,
 			"Access to block zero in inode %llu "
 			"start_block: %llx start_off: %llx "
 			"blkcnt: %llx extent-state: %x\n",