ASoC: wm_hubs: Rename calibrate_dc_servo()

Really we're enabling it here and the name will become very confusing
shortly.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c
index 6ab69f3..05a02e1 100644
--- a/sound/soc/codecs/wm_hubs.c
+++ b/sound/soc/codecs/wm_hubs.c
@@ -243,7 +243,7 @@
 /*
  * Startup calibration of the DC servo
  */
-static void calibrate_dc_servo(struct snd_soc_codec *codec)
+static void enable_dc_servo(struct snd_soc_codec *codec)
 {
 	struct wm_hubs_data *hubs = snd_soc_codec_get_drvdata(codec);
 	struct wm_hubs_dcs_cache *cache;
@@ -556,7 +556,7 @@
 		snd_soc_update_bits(codec, WM8993_DC_SERVO_1,
 				    WM8993_DCS_TIMER_PERIOD_01_MASK, 0);
 
-		calibrate_dc_servo(codec);
+		enable_dc_servo(codec);
 
 		reg |= WM8993_HPOUT1R_OUTP | WM8993_HPOUT1R_RMV_SHORT |
 			WM8993_HPOUT1L_OUTP | WM8993_HPOUT1L_RMV_SHORT;