arm64: dts: mediatek: mt8183-kukui: Use default min voltage for MT6358

The requested voltage could be lower than the minimum voltage on the
GPU OPP table when the MTK Smart Voltage Scaling (SVS) driver is
enabled, so removing the definition in mt8183-kukui to use the default
minimum voltage (500000 uV) defined in mt6358.dtsi.

Fixes: 31c6732d ("arm64: dts: mediatek: mt8183-kukui: Override vgpu/vsram_gpu constraints")
Signed-off-by: Pin-yen Lin <treapking@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20240315111621.2263159-4-treapking@chromium.orgSigned-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi

@@ -433,7 +433,6 @@ &mt6358regulator {
 };
 
 &mt6358_vgpu_reg {
-	regulator-min-microvolt = <625000>;
 	regulator-max-microvolt = <900000>;
 
 	regulator-coupled-with = <&mt6358_vsram_gpu_reg>;