arm64: dts: msm8996: Fix dma node name

DMA controller binding describes the node name should be dma-controller
and not dma, so fix the node name
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20201027164511.476312-7-vkoul@kernel.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8996.dtsi

@@ -1990,7 +1990,7 @@ dwc3@7600000 {
 			};
 		};
 
-		slimbam: dma@9184000 {
+		slimbam: dma-controller@9184000 {
 			compatible = "qcom,bam-v1.7.0";
 			qcom,controlled-remotely;
 			reg = <0x09184000 0x32000>;