bluetooth: update bluetooth-power platform data

Update bluetooth power driver to support both device tree
to power on bluetooth chipset.

Driver checks for device tree node to provide all the
required vregs and gpio data to power on the bluetooth
chipset.

Change-Id: Ib1bb6f4853bc1ae724817cab53ae3661be034e92
Signed-off-by: Vadivel Thekkamalai <vthekk@codeaurora.org>