target: msm8952: Add dead battery charging support for SDM429W

Move dead battery charging (partially) from SBL to LK.
LK supports display and hence moving the charging to LK will
keep the user informed that the device is up and charging.
LK charges the battery from SBL exit threshold (3.2V) to
HLOS entry threshold - configurable (3.4V).

Change-Id: I537bd5e56d49b098b1bd8b8613651f9e102d26d8
Signed-off-by: Umang Chheda <uchheda@codeaurora.org>
4 files changed