arm64: dts: qcom: msm8996: Strictly limit USB2 host to USB2 speeds

As the name implies, the USB2 controller should only operate at
USB2 speeds. Make sure it does just that by pinning it to USB
High-Speed (USB2) mode.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210525200246.118323-3-konrad.dybcio@somainline.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8996.dtsi

@@ -2593,6 +2593,7 @@ usb2: usb@76f8800 {
 			assigned-clock-rates = <19200000>, <60000000>;
 
 			power-domains = <&gcc USB30_GDSC>;
+			qcom,select-utmi-as-pipe-clk;
 			status = "disabled";
 
 			dwc3@7600000 {
@@ -2601,6 +2602,7 @@ dwc3@7600000 {
 				interrupts = <0 138 IRQ_TYPE_LEVEL_HIGH>;
 				phys = <&hsusb_phy2>;
 				phy-names = "usb2-phy";
+				maximum-speed = "high-speed";
 				snps,dis_u2_susphy_quirk;
 				snps,dis_enblslpm_quirk;
 			};