thermal: mt8173: minor mtk_thermal.c cleanups

If thermal bank with 4 sensors, thermal driver should read TEMP_MSR3.

However, currently thermal driver would not read TEMP_MSR3 since mt8173
thermal driver only use 3 sensors on each thermal bank at the same time,
so this patch would not effect temperature.
Only if mt mt8173 thermal driver use 4 sensors on any thermal bank, would
read third sensor two times, and lose fourth sensor of vale.

cc: [e-mail]
Fixes: b7cf0053738c ("thermal: Add Mediatek thermal driver for mt2701.")
Reviewed-by: Matthias Brugger <[e-mail]>
Signed-off-by: Dawei Chien <[e-mail]>
Signed-off-by: Eduardo Valentin <[e-mail]>

drivers/thermal/mtk_thermal.c

···
 };
 
 static const int mt8173_msr[MT8173_NUM_SENSORS_PER_ZONE] = {
-	TEMP_MSR0, TEMP_MSR1, TEMP_MSR2, TEMP_MSR2
+	TEMP_MSR0, TEMP_MSR1, TEMP_MSR2, TEMP_MSR3
 };
 
 static const int mt8173_adcpnp[MT8173_NUM_SENSORS_PER_ZONE] = {