ASoC: adau17x1: Use empty struct initializer

{ 0 } only clears the first member of the structure.

The first member of the snd_soc_dapm_update struct is a pointer,
and writing 0 to a pointer results in a sparse warning.

Use the empty struct initializer that clears all the struct members
and fixes the sparse warning.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/adau17x1.c

@@ -181,7 +181,7 @@ static int adau17x1_dsp_mux_enum_put(struct snd_kcontrol *kcontrol,
 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 	struct adau *adau = snd_soc_component_get_drvdata(component);
 	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
-	struct snd_soc_dapm_update update = { 0 };
+	struct snd_soc_dapm_update update = {};
 	unsigned int stream = e->shift_l;
 	unsigned int val, change;
 	int reg;