ASoC: nau8315: revise the power event of EN_PIN dapm widget for symmetry

This patch is to revise the power event of EN_PIN dapm widget for symmetry.

Signed-off-by: David Lin <CTLIN0@nuvoton.com>
Link: https://lore.kernel.org/r/20201110095823.3512447-1-CTLIN0@nuvoton.com


Signed-off-by: Mark Brown <broonie@kernel.org>