block: tidy up a warning in bio_check_ro

The "generic_make_request: " prefix has no value, and will soon become
stale.

Signed-off-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

block/blk-core.c

···
 			return false;
 
 		WARN_ONCE(1,
-		       "generic_make_request: Trying to write "
-			"to read-only block-device %s (partno %d)\n",
+		       "Trying to write to read-only block-device %s (partno %d)\n",
 			bio_devname(bio, b), part->partno);
 		/* Older lvm-tools actually trigger this */
 		return false;