ARM: dts: msm: add stub regulator devices for Lahaina

Add stub regulator devices for the SMPS, LDO, and BOB regulators
found on the PM8350, PM8350C, and PM8008 PMIC chips which are
used on Lahaina boards.  This ensures that consumers can make use
of the regulators which have appropriate voltage limits.

Change-Id: I87bd3dbd9b9dc5d082fe90689edcd6fa090e7739