ASoC: twl6040: Rename pga_event to out_drv_event

This event handler is used with the OUT_DRV widgets.
The name pga_event was misleading.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
1 file changed