gpu: ipu-v3: csi: add support for 8 bpp grayscale sensors.

Enable the MEDIA_BUS_FMT_Y8_1X8 format.
Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/gpu/ipu-v3/ipu-csi.c

@@ -271,6 +271,7 @@ static int mbus_code_to_bus_cfg(struct ipu_csi_bus_config *cfg, u32 mbus_code)
 	case MEDIA_BUS_FMT_SGBRG8_1X8:
 	case MEDIA_BUS_FMT_SGRBG8_1X8:
 	case MEDIA_BUS_FMT_SRGGB8_1X8:
+	case MEDIA_BUS_FMT_Y8_1X8:
 		cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_BAYER;
 		cfg->mipi_dt = MIPI_DT_RAW8;
 		cfg->data_width = IPU_CSI_DATA_WIDTH_8;