scsi: ufs: Fix the build for the old ARM OABI

JIRA: https://issues.redhat.com/browse/RHEL-79078

commit d0bac0e
Author: Bart Van Assche <bvanassche@acm.org>
Date:   Tue Aug 29 09:35:42 2023 -0700

    scsi: ufs: Fix the build for the old ARM OABI

    All structs and unions are word aligned when using the OABI. Mark the union
    in struct utp_upiu_header as packed to prevent that the compiler inserts
    padding bytes.

    Cc: Arnd Bergmann <arnd@arndb.de>
    Reported-by: kernel test robot <lkp@intel.com>
    Closes: https://lore.kernel.org/oe-kbuild-all/202308251634.tuRn4OVv-lkp@intel.com/
    Fixes: 617bfaa ("scsi: ufs: Simplify response header parsing")
    Signed-off-by: Bart Van Assche <bvanassche@acm.org>
    Link: https://lore.kernel.org/r/20230829163547.1200183-1-bvanassche@acm.org
    Reviewed-by: Arnd Bergmann <arnd@arndb.de>
    Reviewed-by: Bean Huo <beanhuo@micron.com>
    Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: Radu Rendec <rrendec@redhat.com>

Author: rrendec

include/uapi/scsi/scsi_bsg_ufs.h

@@ -83,7 +83,7 @@ struct utp_upiu_header {
 			union {
 				__u8 tm_function;
 				__u8 query_function;
-			};
+			} __attribute__((packed));
 			__u8 response;
 			__u8 status;
 			__u8 ehs_length;