arm64: dts: mediatek: mt8192: Fix GPU thermal zone name for SVS

This SoC has two GPU related thermal zones: the primary zone must be
called "gpu-thermal" for SVS to pick it up.

Fixes: c7a72805 ("arm64: dts: mediatek: mt8192: Add thermal nodes and thermal zones")
Link: https://lore.kernel.org/r/20240410083002.1357857-3-angelogioacchino.delregno@collabora.comSigned-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

arch/arm64/boot/dts/mediatek/mt8192.dtsi

@@ -2234,7 +2234,7 @@ vpu1_crit: trip-crit {
 			};
 		};
 
-		gpu0-thermal {
+		gpu-thermal {
 			polling-delay = <1000>;
 			polling-delay-passive = <250>;
 			thermal-sensors = <&lvts_ap MT8192_AP_GPU0>;