media: v4l: fwnode: C-PHY has no clock lane

C-PHY doesn't use a clock lane, hence the test for the clock lane when
there isn't one is faulty. Rework the test for the conflicting clock lane.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/v4l2-core/v4l2-fwnode.c

@@ -212,8 +212,8 @@ static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode,
 		have_clk_lane = true;
 	}
 
-	if (lanes_used & BIT(clock_lane)) {
-		if (have_clk_lane || !use_default_lane_mapping)
+	if (have_clk_lane && lanes_used & BIT(clock_lane) &&
+	    !use_default_lane_mapping) {
 		pr_warn("duplicated lane %u in clock-lanes, using defaults\n",
 			v);
 		use_default_lane_mapping = true;