block: rename blk_scsi_cmd_filter to blk_cmd_filter

Technically, the cmd_filter would be applied to other protocols though
it's unlikely to happen. Putting SCSI stuff to request_queue is kinda
layer violation. So let's rename it.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index d01ef5e..ec4b7f2 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -105,7 +105,7 @@
 	return put_user(1, p);
 }
 
-void blk_set_cmd_filter_defaults(struct blk_scsi_cmd_filter *filter)
+void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
 {
 	/* Basic read-only commands */
 	__set_bit(TEST_UNIT_READY, filter->read_ok);