power: sequencing: qcom-wcn: add support for WCN39xx

power: sequencing: qcom-wcn: add support for WCN39xx

The WCN39xx family of WiFi/BT chips incorporates a simple PMU, spreading
voltages over internal rails. Implement power sequencing support for
this generation of WCN chips. Unlike later devices, they don't have
separate enable GPIO lines, letting the chip figure out the necessary
parts on its own.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260106-wcn3990-pwrctl-v2-5-0386204328be@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>