scsi: cxlflash: 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/[e-mail]
Signed-off-by: Bart Van Assche <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/cxlflash/main.c

···
 static DEVICE_ATTR_RW(num_hwqs);
 static DEVICE_ATTR_RW(hwq_mode);
 
-static struct device_attribute *cxlflash_host_attrs[] = {
-	&dev_attr_port0,
-	&dev_attr_port1,
-	&dev_attr_port2,
-	&dev_attr_port3,
-	&dev_attr_lun_mode,
-	&dev_attr_ioctl_version,
-	&dev_attr_port0_lun_table,
-	&dev_attr_port1_lun_table,
-	&dev_attr_port2_lun_table,
-	&dev_attr_port3_lun_table,
-	&dev_attr_irqpoll_weight,
-	&dev_attr_num_hwqs,
-	&dev_attr_hwq_mode,
+static struct attribute *cxlflash_host_attrs[] = {
+	&dev_attr_port0.attr,
+	&dev_attr_port1.attr,
+	&dev_attr_port2.attr,
+	&dev_attr_port3.attr,
+	&dev_attr_lun_mode.attr,
+	&dev_attr_ioctl_version.attr,
+	&dev_attr_port0_lun_table.attr,
+	&dev_attr_port1_lun_table.attr,
+	&dev_attr_port2_lun_table.attr,
+	&dev_attr_port3_lun_table.attr,
+	&dev_attr_irqpoll_weight.attr,
+	&dev_attr_num_hwqs.attr,
+	&dev_attr_hwq_mode.attr,
 	NULL
 };
+
+ATTRIBUTE_GROUPS(cxlflash_host);
 
 /*
  * Device attributes
  */
 static DEVICE_ATTR_RO(mode);
 
-static struct device_attribute *cxlflash_dev_attrs[] = {
-	&dev_attr_mode,
+static struct attribute *cxlflash_dev_attrs[] = {
+	&dev_attr_mode.attr,
 	NULL
 };
+
+ATTRIBUTE_GROUPS(cxlflash_dev);
 
 /*
  * Host template
···
 	.this_id = -1,
 	.sg_tablesize = 1,	/* No scatter gather support */
 	.max_sectors = CXLFLASH_MAX_SECTORS,
-	.shost_attrs = cxlflash_host_attrs,
-	.sdev_attrs = cxlflash_dev_attrs,
+	.shost_groups = cxlflash_host_groups,
+	.sdev_groups = cxlflash_dev_groups,
 };
 
 /*