drivers: sensor: infineon: fix typo in calibration gain assertion

Corrected a typo in the calibration gain assertion

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

Author: kartben

drivers/sensor/infineon/xmc4xxx_temp/xmc4xxx_temp.c

@@ -71,7 +71,7 @@ static int xmc4xxx_temp_init(const struct device *dev)
 		     CONFIG_XMC4XXX_TEMP_CALIBRATE_OFFSET <= 63);
 
 	BUILD_ASSERT(CONFIG_XMC4XXX_TEMP_CALIBRATE_GAIN >= 0 &&
-		     CONFIG_XMC4XXX_TEMP_CALIBRATE_OFFSET <= 63);
+		     CONFIG_XMC4XXX_TEMP_CALIBRATE_GAIN <= 63);
 
 	XMC_SCU_CalibrateTemperatureSensor(CONFIG_XMC4XXX_TEMP_CALIBRATE_OFFSET & 0x7f,
 					   CONFIG_XMC4XXX_TEMP_CALIBRATE_GAIN);