arm64: dts: imx8mq-librem5: Remove dis_u3_susphy_quirk from usb_dwc3_0

This reduces power consumption in system suspend by about 10%.

Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>