arm64: dts: imx8mn-beacon: Enable SDR104 on WiFi SDIO interface

Enable 100Mhz and 200MHz pinmux and corrsesponding voltage supplies
to enable SDR104 on usdhc1 connecting the WiFi chip.

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>