arm64: dts: qcom: sdm845: Add SoC compatible to MTP

Add missing SoC compatible to SDM845 MTP board file.
Reviewed-by: NMatthias Kaehlcke <mka@chromium.org>
Reviewed-by: NAmit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: NSibi Sankar <sibis@codeaurora.org>
Link: https://lore.kernel.org/r/20200504202243.5476-2-sibis@codeaurora.orgSigned-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sdm845-mtp.dts

@@ -13,7 +13,7 @@
 
 / {
 	model = "Qualcomm Technologies, Inc. SDM845 MTP";
-	compatible = "qcom,sdm845-mtp";
+	compatible = "qcom,sdm845-mtp", "qcom,sdm845";
 
 	aliases {
 		serial0 = &uart9;