nvmet: fix rw control endian access

Fixes: 3ec5c62c ("nvmet: handle rw's limited retry flag")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202501142128.WexgyMTv-lkp@intel.com/


Cc: Guixin Liu <kanie@linux.alibaba.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>