Claude review: arm64: dts: qcom: sdm670-google: add common device tree include

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

This is the main refactoring patch. The approach of extracting common elements into `sdm670-google-common.dtsi` and making per-device DTS files thin overlays is clean.

> -		charge-full-design-microamp-hours = <3000000>;

The `charge-full-design-microamp-hours` property is removed from the common include and added back in the sargo-specific DTS with the same value. This makes sense since the 3a XL has a different battery capacity (3700 mAh vs 3000 mAh).

> +		framebuffer: framebuffer@9c000000 {
> +			compatible = "simple-framebuffer";
> +			/* dimensions and size are in specific device trees */
> +			format = "a8r8g8b8";
> +			status = "disabled";
>  		};

The framebuffer is disabled in the common include and re-enabled with device-specific dimensions in each board DTS. However, `simple-framebuffer` nodes without `reg`, `width`, `height`, and `stride` properties are incomplete. Since the node is `status = "disabled"`, this is fine at runtime, but it may generate DT validation warnings. The `reg` property is also omitted from the common include but provided in the per-device overrides.

> +&rmi4_f12 {
> +	touchscreen-x-mm = <63>;
> +	touchscreen-y-mm = <127>;
> +};

The original sargo DTS had `touchscreen-x-mm = <62>`, but the new sargo DTS sets it to `<63>`. Is this an intentional correction, or a typo introduced during the refactoring? The commit message doesn't mention this change. If intentional, it would be worth noting in the commit message.

> -	panel: panel@0 {
> -		compatible = "samsung,s6e3fa7-ams559nk06";
> +	panel: panel@0 {
> +		/* compatible is provided in specific device trees */
>  		reg = <0>;

The panel node is left without a `compatible` and with `status = "disabled"` in the common include. This is correct -- the per-device DTS provides both the compatible and `status = "okay"`.

> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0-only

The SPDX license identifier changed from `GPL-2.0` to `GPL-2.0-only` in the new sargo DTS. While `GPL-2.0-only` is more precise, this is a license change that should probably be noted in the commit message or handled as a separate patch, as it changes the licensing terms.

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