ASoC: codec: enable power supply for wcd9326 on apq8009

On apq8009 som board, power supply to wcd9326 is controlled by
GPIO. Add PMIC GPIO pinctrl enablement for it.

Change-Id: I93986516d5c41dccec3172a138be5b6bfe4098e2
Signed-off-by: Meng Wang <mengw@codeaurora.org>