msm: board-8064: switch to RPM control for most regulators

Switch control of most regulators from the pm8xxx-regulator
driver to the rpm-regulator driver. pm8xxx-regulator will still
be used for LDO 26 because it is not handled by the RPM.
USB OTG MVS and HDMI MVS will also remain under pm8xxx-regulator
control because they are Apps-only and require integration with
GPIO control FETs to be useful.

Change-Id: I55115d8cca17f3e9046efaeb47bb5d9ebd1828fb
Signed-off-by: David Collins <collinsd@codeaurora.org>