staging: ti-soc-thermal: make unexported functions local

Move _ti_bandgap_write_threshold and _ti_bandgap_read_threshold to static
area, as they are local functions.
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ti-soc-thermal/ti-bandgap.c

@@ -475,8 +475,8 @@ static inline int ti_bandgap_validate(struct ti_bandgap *bgp, int id)
  * Validates the mCelsius range and update the requested threshold.
  * Call this function only if bandgap features HAS(TALERT).
  */
-int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val,
-				bool hot)
+static int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val,
+				       bool hot)
 {
 	struct temp_sensor_data *ts_data;
 	struct temp_sensor_registers *tsr;
@@ -529,8 +529,8 @@ int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val,
  * This function can be used to read t_hot or t_cold, depending on @hot value.
  * Call this function only if bandgap features HAS(TALERT).
  */
-int _ti_bandgap_read_threshold(struct ti_bandgap *bgp, int id,
-			       int *val, bool hot)
+static int _ti_bandgap_read_threshold(struct ti_bandgap *bgp, int id,
+				      int *val, bool hot)
 {
 	struct temp_sensor_registers *tsr;
 	u32 temp, mask;