regulator: qpnp-labibb: Add support for PM660A

Modify the driver to support the new lab/ibb
hardware changes supported on PM660A.

New hardware supports the following features:
1) Smart pulse skip mode
2) LDO mode for LAB
3) PFM mode
4) PBS sequencer handling SWIRE decoding
5) Default output voltage configuration

Change-Id: I5461995cc0ac930dd354c63b97223085306e869d
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>