arm64: dts: qcom: msm8998: declare VLS CLAMP register for USB3 PHY

The USB3 PHY on the MSM8998 platform doesn't have built-in
PCS_MISC_CLAMP_ENABLE register. Instead clamping is handled separately
via the register in the TCSR space. Declare corresponding register.

Fixes: 026dad8f ("arm64: dts: qcom: msm8998: Add USB-related nodes")
Cc: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://lore.kernel.org/r/20240117-usbc-phy-vls-clamp-v2-4-a950c223f10f@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/msm8998.dtsi

@@ -1072,6 +1072,11 @@ tcsr_regs_1: syscon@1f60000 {
 			reg = <0x01f60000 0x20000>;
 		};
 
+		tcsr_regs_2: syscon@1fc0000 {
+			compatible = "qcom,msm8998-tcsr", "syscon";
+			reg = <0x01fc0000 0x26000>;
+		};
+
 		tlmm: pinctrl@3400000 {
 			compatible = "qcom,msm8998-pinctrl";
 			reg = <0x03400000 0xc00000>;
@@ -2177,6 +2182,8 @@ usb3phy: phy@c010000 {
 			reset-names = "phy",
 				      "phy_phy";
 
+			qcom,tcsr-reg = <&tcsr_regs_2 0xb244>;
+
 			status = "disabled";
 		};