shields: st_b_cams_omv_mb1683: remove i2c/dcmi/dmamux nodes from overlay

The i2c bus configuration and dcmi pins alternate function settings are
already done within the board dts since this is fixed for each board
so remove then from the shield overlay.
The dmamux node enabling is also removed since currently the DCMI/DMA
cannot rely on dmamux.

In the shield main overlay file, ensure that the i2c bus is properly
enabled.

Signed-off-by: Alain Volmat <[email protected]>

Author: Alain Volmat

boards/shields/st_b_cams_omv_mb1683/boards/stm32h7b3i_dk.overlay

@@ -5,24 +5,6 @@
  *
  */
 
-&st_cam_i2c {
-	pinctrl-0 = <&i2c4_scl_pd12 &i2c4_sda_pd13>;
-	pinctrl-names = "default";
-	status = "okay";
-	clock-frequency = <I2C_BITRATE_FAST>;
-};
-
-&st_cam_dvp {
-	pinctrl-0 = <&dcmi_hsync_pa4 &dcmi_pixclk_pa6 &dcmi_vsync_pb7
-		     &dcmi_d0_pc6 &dcmi_d1_pc7 &dcmi_d2_pg10 &dcmi_d3_pc9
-		     &dcmi_d4_pc11 &dcmi_d5_pd3 &dcmi_d6_pb8 &dcmi_d7_pb9>;
-	pinctrl-names = "default";
-};
-
 &dma1 {
 	status = "okay";
 };
-
-&dmamux1 {
-	status = "okay";
-};

boards/shields/st_b_cams_omv_mb1683/st_b_cams_omv_mb1683.overlay

@@ -14,6 +14,8 @@
 };
 
 &st_cam_i2c {
+	status = "okay";
+
 	ov5640: ov5640@3c {
 		compatible = "ovti,ov5640";
 		reg = <0x3c>;