target: Fix pll locking sequence for MSM8974

This change fixes several issues related to pll locking
sequence for MSM8974 target.

* Reduce the pll locking time

* Separate the pll locking sequence to BDD format.

* Update pll lock detect configuration register based on
  suggestion.

Change-Id: Ie37b50abf89a23340e7a932abd9b015d259ee08b
2 files changed