scsi: smartpqi: Fix byte aligned writew for ARM servers

Correct OOPs on ARM servers during driver init.

The driver attempts to update FW with max_feature_supported value using a
writew() kernel call using a byte aligned address. This fails on some ARM
systems.

Change the writew() to two writeb() calls to update this value.
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Link: https://lore.kernel.org/r/20230428153712.297638-9-don.brace@microchip.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/smartpqi/smartpqi_init.c

@@ -7718,8 +7718,8 @@ static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
 			features_requested_iomem_addr +
 			(le16_to_cpu(firmware_features->num_elements) * 2) +
 			sizeof(__le16);
-		writew(PQI_FIRMWARE_FEATURE_MAXIMUM,
-			host_max_known_feature_iomem_addr);
+		writeb(PQI_FIRMWARE_FEATURE_MAXIMUM & 0xFF, host_max_known_feature_iomem_addr);
+		writeb((PQI_FIRMWARE_FEATURE_MAXIMUM & 0xFF00) >> 8, host_max_known_feature_iomem_addr + 1);
 	}
 
 	return pqi_config_table_update(ctrl_info,