msm: 8974: Switch regulators back to RPM control

The RPM has now been tested and can support the regulators in our
configuration.

Effectively revert the following change:

commit 2465c68e
Author: Michael Bohan <mbohan@codeaurora.org>
Date:   Wed Aug 8 09:06:11 2012 -0700

    msm: 8974: Switch regulators from rpm to local control

Make a correction along the way to switch 8941_l4 to be the
correct voltage of 1225000 uV.

Change-Id: I54afc959d28fd9b9c74c24d7184010af30cad864
Signed-off-by: Michael Bohan <mbohan@codeaurora.org>