arm64: dts: qcom: sc7280: Mark PCIe controller as cache coherent

If the controller is not marked as cache coherent, then kernel will
try to ensure coherency during dma-ops and that may cause data corruption.
So, mark the PCIe node as dma-coherent as the devices on PCIe bus are
cache coherent.

Cc: stable@vger.kernel.org
Fixes: 92e0ee9 ("arm64: dts: qcom: sc7280: Add PCIe and PHY related node")
Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/1677584952-17496-1-git-send-email-quic_krichai@quicinc.com

Author: Krishna chaitanya chundru

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

@@ -2131,6 +2131,8 @@
 			pinctrl-names = "default";
 			pinctrl-0 = <&pcie1_clkreq_n>;
 
+			dma-coherent;
+
 			iommus = <&apps_smmu 0x1c80 0x1>;
 
 			iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,