nvmet: check that host sqsize does not exceed ctrl MQES

Check that host sqsize is not greater-than Maximum Queue Entries
Supported (MQES) value supported by the controller.

Signed-off-by: Amit Engel <amit.engel@dell.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>