A struct scsi_cmnd already contains T10 DIF protection type information in
prot_type.  So, instead of manually checking a CDBs' RD/WRPROTECT fields
with (byte[1] >> 5) utilize scsi_get_prot_type().
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20240429221547.6842-3-justintee8345@gmail.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>