ASoC: rouleur: Change hph and ear gain according to soc capacity

Register to power supply framework to get soc capacity.
Reduce ear and hph gain for reduced voltage to optimize
power consumption. Also set LD22 voltage to lower value
for low SoC.

Change-Id: I94de9341b8c7307128d3cd41c7398c31d57fa685
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>

asoc/codecs/bolero/bolero-cdc.h

@@ -50,6 +50,7 @@ enum {
 	BOLERO_MACRO_EVT_BCS_CLK_OFF,
 	BOLERO_MACRO_EVT_SSR_GFMUX_UP,
 	BOLERO_MACRO_EVT_PRE_SSR_UP,
+	BOLERO_MACRO_EVT_RX_PA_GAIN_UPDATE,
 };
 
 enum {