arm64: dts: imx8mp-evk: enable usb1 as host mode

Enable usb host port with type-A connector on imx8mp-evk board.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Li Jun <jun.li@nxp.com>
Link: https://lore.kernel.org/r/1609241866-9508-5-git-send-email-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>