power: update power HAL for Ondemand support

Change-Id: I821d71e8681467927b21644f6891b36f11e11aa2
u2: add support for LM3530 LCD Backlight Driver

Change-Id: Iac99c464541eb65d5a1234cbcb8a1cc56ace8e3a
u2-common: enable permissions for Bluetooth LE

Change-Id: I2db7e15d65e67329fc66760da5b3c9350987c9eb