arm64: dts: renesas: eagle-function-expansion: Align GPIO hog name with bindings

arm64: dts: renesas: eagle-function-expansion: Align GPIO hog name with bindings

Bindings expect GPIO hog names to end with 'hog' suffix, so correct it
to fix dtbs_check warning:

    r8a77970-eagle-function-expansion.dtb: gpio@27: 'vin0_adv7612_en' does not match any of the regexes: '^(hog-[0-9]+|.+-hog(-[0-9]+)?)$', 'pinctrl-[0-9]+'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250115211755.194219-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>