ARM: dts: qcom: mdm9615: User generic node name for DMA

Qcom BAM DT spec expects generic DMA controller node name as
"dma-controller" to enable validations.
Signed-off-by: Kuldeep Singh <singh.kuldeep87k@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220410175056.79330-3-singh.kuldeep87k@gmail.com

arch/arm/boot/dts/qcom-mdm9615.dtsi

@@ -330,7 +330,7 @@ pmicgpio: gpio@150 {
 			};
 		};
 
-		sdcc1bam: dma@12182000{
+		sdcc1bam: dma-controller@12182000{
 			compatible = "qcom,bam-v1.3.0";
 			reg = <0x12182000 0x8000>;
 			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
@@ -340,7 +340,7 @@ sdcc1bam: dma@12182000{
 			qcom,ee = <0>;
 		};
 
-		sdcc2bam: dma@12142000{
+		sdcc2bam: dma-controller@12142000{
 			compatible = "qcom,bam-v1.3.0";
 			reg = <0x12142000 0x8000>;
 			interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;