ASoC: rt5645: Rename HP control to Headphone

Use the standard name "Headphone" instead of "HP" for better
userspace integration.
Signed-off-by: NNicolas Boichat <drinkcat@chromium.org>
Acked-by: NBard Liao <bardliao@realtek.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/codecs/rt5645.c

@@ -464,9 +464,9 @@ static const struct snd_kcontrol_new rt5645_snd_controls[] = {
 		RT5645_L_VOL_SFT, RT5645_R_VOL_SFT, 39, 1, out_vol_tlv),
 
 	/* Headphone Output Volume */
-	SOC_DOUBLE("HP Channel Switch", RT5645_HP_VOL,
+	SOC_DOUBLE("Headphone Channel Switch", RT5645_HP_VOL,
 		RT5645_VOL_L_SFT, RT5645_VOL_R_SFT, 1, 1),
-	SOC_DOUBLE_TLV("HP Playback Volume", RT5645_HP_VOL,
+	SOC_DOUBLE_TLV("Headphone Playback Volume", RT5645_HP_VOL,
 		RT5645_L_VOL_SFT, RT5645_R_VOL_SFT, 39, 1, out_vol_tlv),
 
 	/* OUTPUT Control */