dts: qcs6490-rb3gen2-u-boot: USB host mode

Adjust DTS so USB runs in host mode. The type-c port is the only
supported port (since the others need PCIe). Booting from USB is
possible with a powered type-c dock.

Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
1 file changed