ASoC: TWL4030: Add Analog PGA control switch to DAPM

Add all four APGA switch to DAPM routing and widgets.
Add user control for DA enable for all APGA as normal
control.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>