ARM: dts: msm: Add krait regulator devices for apq8084

APQ8084 runs from a ganged PMIC regulator. Create krait regulator
devices to control LDO/BHS mode and phases/voltage on the PMIC gang.

While at it also add the device for the gang regulator. This device
is responsible for implementing overshoot workarounds and also for
checking PMIC gang configuration.

Change-Id: I8dbd91f73e34605c1fb78776e57eba7951d34067
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>