scsi: qla2xxx: Fix regression on sparc64

Commit 98aee70d ("qla2xxx: Add endianizer to max_payload_size
modifier.") in 2014 broke qla2xxx on sparc64, e.g. as in the Sun Blade 1000
/ 2000. Unbreak by partial revert to fix endianness in nvram firmware
default initialization. Also mark the second frame_payload_size in nvram_t
__le16 to avoid new sparse warnings.

Link: https://lore.kernel.org/r/20200827.222729.1875148247374704975.rene@exactcode.com
Fixes: 98aee70d ("qla2xxx: Add endianizer to max_payload_size modifier.")
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: René Rebe <rene@exactcode.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -1626,7 +1626,7 @@ typedef struct {
 	 */
 	uint8_t	 firmware_options[2];
 
-	uint16_t frame_payload_size;
+	__le16	frame_payload_size;
 	__le16	max_iocb_allocation;
 	__le16	execution_throttle;
 	uint8_t	 retry_count;

drivers/scsi/qla2xxx/qla_init.c

@@ -4603,18 +4603,18 @@ qla2x00_nvram_config(scsi_qla_host_t *vha)
 			nv->firmware_options[1] = BIT_7 | BIT_5;
 			nv->add_firmware_options[0] = BIT_5;
 			nv->add_firmware_options[1] = BIT_5 | BIT_4;
-			nv->frame_payload_size = 2048;
+			nv->frame_payload_size = cpu_to_le16(2048);
 			nv->special_options[1] = BIT_7;
 		} else if (IS_QLA2200(ha)) {
 			nv->firmware_options[0] = BIT_2 | BIT_1;
 			nv->firmware_options[1] = BIT_7 | BIT_5;
 			nv->add_firmware_options[0] = BIT_5;
 			nv->add_firmware_options[1] = BIT_5 | BIT_4;
-			nv->frame_payload_size = 1024;
+			nv->frame_payload_size = cpu_to_le16(1024);
 		} else if (IS_QLA2100(ha)) {
 			nv->firmware_options[0] = BIT_3 | BIT_1;
 			nv->firmware_options[1] = BIT_5;
-			nv->frame_payload_size = 1024;
+			nv->frame_payload_size = cpu_to_le16(1024);
 		}
 
 		nv->max_iocb_allocation = cpu_to_le16(256);