dt-bindings: thermal: mediatek: Fix thermal zone definition for MT8186

Fix a thermal zone name for consistency with the other SoCs:
MFG contains GPU, the latter is more specific and must be used here.

The naming must be fixed "atomically" so compilation does not break.
As a result, the change is made in the dt-bindings and in the LVTS
driver within a single commit, despite the checkpatch warning.

The definition can be safely modified here because it is used only
in the LVTS driver, which is modified accordingly, and has not yet
been included in a released kernel.

Fixes: a2ca2023 ("dt-bindings: thermal: mediatek: Add LVTS thermal controller definition for MT8186")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Julien Panis <jpanis@baylibre.com>
Link: https://lore.kernel.org/r/20240603-mtk-thermal-mt818x-dtsi-v7-1-8c8e3c7a3643@baylibre.comSigned-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

drivers/thermal/mediatek/lvts_thermal.c

@@ -1440,7 +1440,7 @@ static const struct lvts_ctrl_data mt8186_lvts_data_ctrl[] = {
 			  .cal_offsets = { 29, 30, 31 } },
 			{ .dt_id = MT8186_ADSP,
 			  .cal_offsets = { 34, 35, 28 } },
-			{ .dt_id = MT8186_MFG,
+			{ .dt_id = MT8186_GPU,
 			  .cal_offsets = { 39, 32, 33 } }
 		},
 		VALID_SENSOR_MAP(1, 1, 1, 0),

include/dt-bindings/thermal/mediatek,lvts-thermal.h

@@ -24,7 +24,7 @@
 #define MT8186_BIG_CPU1	5
 #define MT8186_NNA		6
 #define MT8186_ADSP		7
-#define MT8186_MFG		8
+#define MT8186_GPU		8
 
 #define MT8188_MCU_LITTLE_CPU0	0
 #define MT8188_MCU_LITTLE_CPU1	1