thermal/drivers/sprd: Fix raw temperature clamping in sprd_thm_rawdata_to_temp

The raw temperature data was never clamped to SPRD_THM_RAW_DATA_LOW or
SPRD_THM_RAW_DATA_HIGH because the return value of clamp() was not used.
Fix this by assigning the clamped value to 'rawdata'.

Casting SPRD_THM_RAW_DATA_LOW and SPRD_THM_RAW_DATA_HIGH to u32 is also
redundant and can be removed.

Fixes: 554fdba ("thermal: sprd: Add Spreadtrum thermal driver support")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260307102422.306055-2-thorsten.blum@linux.dev

Author: toblux

drivers/thermal/sprd_thermal.c

@@ -178,7 +178,7 @@ static int sprd_thm_sensor_calibration(struct device_node *np,
 static int sprd_thm_rawdata_to_temp(struct sprd_thermal_sensor *sen,
 				    u32 rawdata)
 {
-	clamp(rawdata, (u32)SPRD_THM_RAW_DATA_LOW, (u32)SPRD_THM_RAW_DATA_HIGH);
+	rawdata = clamp(rawdata, SPRD_THM_RAW_DATA_LOW, SPRD_THM_RAW_DATA_HIGH);
 
 	/*
 	 * According to the thermal datasheet, the formula of converting