dt-bindings: arm: qcom: Drop qcom,mtp

qcom,mtp is used msm8916-mtp.dts but not documented, it is a generic mtp
compatible and we have specfifc ones for each mtp so drop this

arch/arm64/boot/dts/qcom/msm8916-mtp.dt.yaml: /: compatible: 'oneOf' conditional failed, one must be fixed:
        ['qcom,msm8916-mtp', 'qcom,msm8916-mtp/1', 'qcom,msm8916', 'qcom,mtp'] is too long
        Additional items are not allowed ('qcom,msm8916', 'qcom,mtp' were unexpected)
        Additional items are not allowed ('qcom,mtp' was unexpected)
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210308060826.3074234-8-vkoul@kernel.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8916-mtp.dts

@@ -9,6 +9,5 @@
 
 / {
 	model = "Qualcomm Technologies, Inc. MSM 8916 MTP";
-	compatible = "qcom,msm8916-mtp", "qcom,msm8916-mtp/1",
-			"qcom,msm8916", "qcom,mtp";
+	compatible = "qcom,msm8916-mtp", "qcom,msm8916-mtp/1", "qcom,msm8916";
 };