scsi: qedf: 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/qedf/qedf.h

···
 extern struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport,
 	u8 cmd_type);
 
-extern struct device_attribute *qedf_host_attrs[];
+extern const struct attribute_group *qedf_host_groups[];
 extern void qedf_cmd_timer_set(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
 	unsigned int timer_msec);
 extern int qedf_init_mp_req(struct qedf_ioreq *io_req);

drivers/scsi/qedf/qedf_attr.c

···
 static DEVICE_ATTR_RO(fcoe_mac);
 static DEVICE_ATTR_RO(fka_period);
 
-struct device_attribute *qedf_host_attrs[] = {
-	&dev_attr_fcoe_mac,
-	&dev_attr_fka_period,
+static struct attribute *qedf_host_attrs[] = {
+	&dev_attr_fcoe_mac.attr,
+	&dev_attr_fka_period.attr,
 	NULL,
+};
+
+static const struct attribute_group qedf_host_attr_group = {
+	.attrs = qedf_host_attrs
+};
+
+const struct attribute_group *qedf_host_groups[] = {
+	&qedf_host_attr_group,
+	NULL
 };
 
 extern const struct qed_fcoe_ops *qed_ops;

drivers/scsi/qedf/qedf_main.c

···
 	.cmd_per_lun	= 32,
 	.max_sectors 	= 0xffff,
 	.queuecommand 	= qedf_queuecommand,
-	.shost_attrs	= qedf_host_attrs,
+	.shost_groups	= qedf_host_groups,
 	.eh_abort_handler	= qedf_eh_abort,
 	.eh_device_reset_handler = qedf_eh_device_reset, /* lun reset */
 	.eh_target_reset_handler = qedf_eh_target_reset, /* target reset */