arm64: dts: imx93: Add imx93w.dtsi for i.MX93 Wireless SiP

Introduce imx93w.dtsi to describe the new NXP i.MX93 Wireless SiP, which
integrates the i.MX93 application processor with the NXP IW610 WLCSP
(Wi-Fi + Bluetooth LE + 802.15.4) connectivity device.

The new imx93w.dtsi is based on imx93.dtsi and adds the pieces required
for the internal connection between i.MX93 and IW610 inside the SiP.
This includes USDHC3 which is used as the host interface to the IW610
and the required GPIO settings(e.g. WL_RST, WL_REG_ON, etc.).

These nodes reflect internal SiP wiring and are not board specific, so
they are placed in a dedicated imx93w.dtsi file that can be reused by
multiple boards adopting the i.MX93 Wireless SiP.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

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