arm64: zynqmp: Disable USB3.0 for zc1751-xm016-dc2

The board zynqmp-zc1751-xm016-dc2 support only USB2.0 that's why remove
USB3.0 DT configuration.
Signed-off-by: Piyush Mehta <piyush.mehta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/ad019501a851c5730427af948b636316f10b2e3b.1683034376.git.michal.simek@amd.com

arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm016-dc2.dts

@@ -485,8 +485,6 @@ &usb1 {
 &dwc3_1 {
 	status = "okay";
 	dr_mode = "host";
-	snps,usb3_lpm_capable;
-	maximum-speed = "super-speed";
 };
 
 &uart0 {