scsi: 3w-xxxx: Switch to attribute groups

struct device supports attribute groups directly but does not support
struct device_attribute directly. Hence switch to attribute groups.

Link: https://lore.kernel.org/r/20211012233558.4066756-10-bvanassche@acm.orgSigned-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/3w-xxxx.c

@@ -532,11 +532,13 @@ static struct device_attribute tw_host_stats_attr = {
 };
 
 /* Host attributes initializer */
-static struct device_attribute *tw_host_attrs[] = {
-	&tw_host_stats_attr,
+static struct attribute *tw_host_attrs[] = {
+	&tw_host_stats_attr.attr,
 	NULL,
 };
 
+ATTRIBUTE_GROUPS(tw_host);
+
 /* This function will read the aen queue from the isr */
 static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
 {
@@ -2240,7 +2242,7 @@ static struct scsi_host_template driver_template = {
 	.sg_tablesize		= TW_MAX_SGL_LENGTH,
 	.max_sectors		= TW_MAX_SECTORS,
 	.cmd_per_lun		= TW_MAX_CMDS_PER_LUN,
-	.shost_attrs		= tw_host_attrs,
+	.shost_groups		= tw_host_groups,
 	.emulated		= 1,
 	.no_write_same		= 1,
 };