arm64: dts: meson-gx: fix spifc compatible

This fixes the following DT schemas check errors:
meson-gxl-s805x-libretech-ac.dt.yaml: spi@8c80: compatible:0: 'amlogic,meson-gx-spifc' is not one of ['amlogic,meson6-spifc', 'amlogic,meson-gxbb-spifc']
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gx.dtsi

@@ -317,7 +317,7 @@ spicc: spi@8d80 {
 			};
 
 			spifc: spi@8c80 {
-				compatible = "amlogic,meson-gx-spifc", "amlogic,meson-gxbb-spifc";
+				compatible = "amlogic,meson-gxbb-spifc";
 				reg = <0x0 0x08c80 0x0 0x80>;
 				#address-cells = <1>;
 				#size-cells = <0>;