ASoC: wm8995: Use SOC_SINGLE_EXT() instead of open-coding it

#define WM8995_SPK2_MUTE_SEQ1_WIDTH                  8	/* SPK2_MUTE_SEQ1 - [7:0] */

#define WM8995_CLASS_W_SWITCH(xname, reg, shift, max, invert) \

{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \

	.info = snd_soc_info_volsw, \

	.get = snd_soc_dapm_get_volsw, .put = wm8995_put_class_w, \

	.private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) \

}

	SOC_SINGLE_EXT(xname, reg, shift, max, invert, \

		snd_soc_dapm_get_volsw, wm8995_put_class_w)

struct wm8995_reg_access {

	u16 read;