ARM: dts: msm: enable UFS and eMMC regulators at boot-up for APQ8084

The default power on sequence enables LDO 3, LDO 4, LDO 19 and LDO 20
regulators which are required to boot from either eMMC or UFS. If the
board is configured to use only one of the storage devices, then the
regulators corresponding to the unused device are unnecessary left
always on.

Update the configuration for the above LDOs so that the kernel enables
these regulators while it's booting up and so that it disables them during
the late_init call stage if the eMMC or UFS driver has not requested that
they be left enabled.

Change-Id: Ifdc559fd3ccd98303ed54e1f9e1ac56160b4404a
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>