ASoC: codecs: max9759: use snd_kcontrol_chip() instead of snd_soc_kcontrol_component()

We have very similar name functions (A)(B). Both gets component from
snd_kcontrol, but (A) is used in callback functions which is registered
through snd_soc_add_component_controls(), (B) is used through
snd_soc_dapm_new_widgets().

(A) snd_soc_kcontrol_component()
(B) snd_soc_dapm_kcontrol_component()

(B) is using very picky way to get component but using it is necessary in
ASoC. But (A) is just wrapper function to snd_kcontrol_chip(), and directly
using it without wrapper is very common way on ALSA.
To reduce confusions of similar function, let's use common way on (A).

Signed-off-by: Kuninori Morimoto <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/max9759.c

···
 static int speaker_gain_control_get(struct snd_kcontrol *kcontrol,
 				    struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
+	struct snd_soc_component *c = snd_kcontrol_chip(kcontrol);
 	struct max9759 *priv = snd_soc_component_get_drvdata(c);
 
 	ucontrol->value.integer.value[0] = priv->gain;
···
 static int speaker_gain_control_put(struct snd_kcontrol *kcontrol,
 				    struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
+	struct snd_soc_component *c = snd_kcontrol_chip(kcontrol);
 	struct max9759 *priv = snd_soc_component_get_drvdata(c);
 
 	if (ucontrol->value.integer.value[0] < 0 ||
···
 static int speaker_mute_get(struct snd_kcontrol *kcontrol,
 			    struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
+	struct snd_soc_component *c = snd_kcontrol_chip(kcontrol);
 	struct max9759 *priv = snd_soc_component_get_drvdata(c);
 
 	ucontrol->value.integer.value[0] = !priv->is_mute;
···
 static int speaker_mute_put(struct snd_kcontrol *kcontrol,
 			    struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
+	struct snd_soc_component *c = snd_kcontrol_chip(kcontrol);
 	struct max9759 *priv = snd_soc_component_get_drvdata(c);
 
 	priv->is_mute = !ucontrol->value.integer.value[0];