io_uring: reshuffle issue_flags

Reshuffle issue flags to keep normal flags separate from the uring_cmd
ctx-setup like flags. Shift the second type to the second byte so it's
easier to add new ones in the future.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d6e4696c883943082d248716f4cd568f37b17a74.1669821213.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

include/linux/io_uring.h

@@ -9,16 +9,15 @@
 enum io_uring_cmd_flags {
 	IO_URING_F_COMPLETE_DEFER	= 1,
 	IO_URING_F_UNLOCKED		= 2,
+	/* the request is executed from poll, it should not be freed */
+	IO_URING_F_MULTISHOT		= 4,
 	/* int's last bit, sign checks are usually faster than a bit test */
 	IO_URING_F_NONBLOCK		= INT_MIN,
 
 	/* ctx state flags, for URING_CMD */
-	IO_URING_F_SQE128		= 4,
-	IO_URING_F_CQE32		= 8,
-	IO_URING_F_IOPOLL		= 16,
-
-	/* the request is executed from poll, it should not be freed */
-	IO_URING_F_MULTISHOT		= 32,
+	IO_URING_F_SQE128		= (1 << 8),
+	IO_URING_F_CQE32		= (1 << 9),
+	IO_URING_F_IOPOLL		= (1 << 10),
 };
 
 struct io_uring_cmd {