[C43][DT] fix SPI support

Fix SPI configuration:
* remove bus that does not exist: lpspi0
* set CN51 SPI as spidev: lpspi3

arch/arm64/boot/dts/seco/seco-imx8qm-c43.dts

@@ -631,10 +631,6 @@
  * |__________________________________________________________________________|
  */
 
-&lpspi0 {
-	status = "okay";
-};
-
 &lpspi2 {
 	#address-cells = <1>;
 	#size-cells = <0>;
@@ -661,13 +657,10 @@
 	pinctrl-0 = <&pinctrl_lpspi3>;
 	status = "okay";
 
-	flash_spi3: flash_spi3@0 {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		reg = <0>;
-		compatible = "s25fl208k", "jedec,spi-nor";
-		spi-max-frequency = <1000000>;
-		status = "okay";
+	spidev0: spi@0 {
+		reg               = <0>;
+		compatible        = "rohm,dh2228fv";
+		spi-max-frequency = <30000000>;
 	};
 };