gpu: ipu-v3: drop unused dmfc field from client platform data

This field is never used, drop it.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

include/video/imx-ipu-v3.h

@@ -343,7 +343,6 @@ struct ipu_client_platformdata {
 	int di;
 	int dc;
 	int dp;
-	int dmfc;
 	int dma[2];
 };