arm64: dts: qcom: sc7280: Add GPI DMA compatible fallback

Use SM6350 as fallback for GPI DMA, to indicate devices are compatible
and that drivers can bind with only one compatible.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221018230352.1238479-4-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/sc7280.dtsi

@@ -920,7 +920,7 @@ opp-384000000 {
 
 		gpi_dma0: dma-controller@900000 {
 			#dma-cells = <3>;
-			compatible = "qcom,sc7280-gpi-dma";
+			compatible = "qcom,sc7280-gpi-dma", "qcom,sm6350-gpi-dma";
 			reg = <0 0x00900000 0 0x60000>;
 			interrupts = <GIC_SPI 244 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 245 IRQ_TYPE_LEVEL_HIGH>,
@@ -1435,7 +1435,7 @@ uart7: serial@99c000 {
 
 		gpi_dma1: dma-controller@a00000 {
 			#dma-cells = <3>;
-			compatible = "qcom,sc7280-gpi-dma";
+			compatible = "qcom,sc7280-gpi-dma", "qcom,sm6350-gpi-dma";
 			reg = <0 0x00a00000 0 0x60000>;
 			interrupts = <GIC_SPI 279 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 280 IRQ_TYPE_LEVEL_HIGH>,