floppy: remove duplicated flag FD_RAW_NEED_DISK

Fix coccinelle warning (without behavior change):

drivers/block/floppy.c:2518:32-48: duplicated argument to & or |
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/block/floppy.c

@@ -2516,8 +2516,7 @@ static int make_raw_rw_request(void)
 	set_fdc((long)current_req->rq_disk->private_data);
 
 	raw_cmd = &default_raw_cmd;
-	raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
-	    FD_RAW_NEED_SEEK;
+	raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK;
 	raw_cmd->cmd_count = NR_RW;
 	if (rq_data_dir(current_req) == READ) {
 		raw_cmd->flags |= FD_RAW_READ;