ionic: rearrange ionic_qcq

Rearange a few fields for better cache use and to put the
flags field up into the first cacheline rather than the last.

    struct ionic_qcq
	Before: /* size: 2176, cachelines: 34, members: 23 */
	After:  /* size: 2112, cachelines: 33, members: 23 */

Reviewed-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>