arm64: dts: apq8096-db820c: Enable wlan and bt en pins

This patch enables regulators and gpios for the Qualcomm QCA6174 BT/WLAN
combo controller.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Thierry Escande <thierry.escande@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>