arm64: dts: lx2160a: enable usb3-lpm-capable for usb3 nodes

Enable USB3 HW LPM feature for lx2160a.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>