[media] media: soc_camera: rcar_vin: Add preliminary R-Car M2 support

This adds R-Car M2 (R8A7791) VIN support. Both H2 and M2
variants look the same from the driver's point of view,
so use GEN2 id for both.

Signed-off-by: Valentine Barshak <[e-mail]>
Acked-by: Laurent Pinchart <[e-mail]>
[[e-mail]: removed changelog from commit message]
Signed-off-by: Guennadi Liakhovetski <[e-mail]>

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/platform/soc_camera/rcar_vin.c

···
 #define VIN_MAX_HEIGHT		2048
 
 enum chip_id {
-	RCAR_H2,
+	RCAR_GEN2,
 	RCAR_H1,
 	RCAR_M1,
 	RCAR_E1,
···
 		dmr = 0;
 		break;
 	case V4L2_PIX_FMT_RGB32:
-		if (priv->chip == RCAR_H2 || priv->chip == RCAR_H1 ||
+		if (priv->chip == RCAR_GEN2 || priv->chip == RCAR_H1 ||
 		    priv->chip == RCAR_E1) {
 			dmr = VNDMR_EXRGB;
 			break;
···
 };
 
 static struct platform_device_id rcar_vin_id_table[] = {
-	{ "r8a7790-vin",  RCAR_H2 },
+	{ "r8a7791-vin",  RCAR_GEN2 },
+	{ "r8a7790-vin",  RCAR_GEN2 },
 	{ "r8a7779-vin",  RCAR_H1 },
 	{ "r8a7778-vin",  RCAR_M1 },
 	{ "uPD35004-vin", RCAR_E1 },