devlink: region: correct port region lookup to use port_ops

The function devlink_port_region_get_by_name() incorrectly uses
region->ops->name to compare the region name. as it is not any critical
impact as ops and port_ops define as union for devlink_region but as per
code logic it should refer port_ops here.

No functional impact as ops and port_ops are part of same union,
and name is the first member of both.

Update it to use region->port_ops->name to properly reference
the name of the devlink port region.

Signed-off-by: Alok Tiwari <[e-mail]>
Reviewed-by: Jiri Pirko <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

net/devlink/region.c

···
 	struct devlink_region *region;
 
 	list_for_each_entry(region, &port->region_list, list)
-		if (!strcmp(region->ops->name, region_name))
+		if (!strcmp(region->port_ops->name, region_name))
 			return region;
 
 	return NULL;