[PATCH] arm64: dts: freescale: imx93-phyboard-nash: Move ADC vref to SoM

[Peng Fan]

On Mon, Jun 02, 2025 at 02:52:07PM +0200, Primoz Fiser wrote:
>Move configuration for ADC voltage reference from board DTS to a SoM
>include file. The SoC ADC reference voltage is connected to a "VDDA_1V8"
>voltage node and supplied by the PMIC's BUCK5 regulator. The reference
>voltage is thus defined by the SoM and cannot be changed by the carrier
>board design and as such belongs into the SoM include file.
>
>Moreover, with this in place, customers designing own carrier boards can
>simply include imx93-phycore-som.dtsi and enable adc1 in their own DTS
>without the need to define dummy ADC vref regulator themselves anymore.
>
>Signed-off-by: Primoz Fiser <primoz.fiser at norik.com>

Reviewed-by: Peng Fan <peng.fan at nxp.com>