arm64: dts: qcom: msm8996-mtp: Add msm8996 compatible

Add qcom,msm8996 compatible to match DT schema.
Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

arch/arm64/boot/dts/qcom/msm8996-mtp.dts

@@ -9,7 +9,7 @@
 
 / {
 	model = "Qualcomm Technologies, Inc. MSM 8996 MTP";
-	compatible = "qcom,msm8996-mtp";
+	compatible = "qcom,msm8996-mtp", "qcom,msm8996";
 
 	aliases {
 		serial0 = &blsp2_uart2;