block: remove wrappers for request type/flags

Remove all the trivial wrappers for the cmd_type and cmd_flags fields in
struct requests.  This allows much easier grepping for different request
types instead of unwinding through macros.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index c1e5cd0..4e8b9bf 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -439,7 +439,7 @@
 
 static enum action do_pd_io_start(void)
 {
-	if (blk_special_request(pd_req)) {
+	if (pd_req->cmd_type == REQ_TYPE_SPECIAL) {
 		phase = pd_special;
 		return pd_special();
 	}