regulator: kryo-regulator: cap LDO voltage request during M3 enter notifier

LDO hardware may have a physical limitation in terms of the maximum
voltage it can provide. Ensure that the requested LDO voltage programmed
during the LDO to BHS switch in the M3 LPM prepare notifier path
does not exceed this limit. If it does, request for the LDO to output
its maximum voltage to allow the BHS switch to complete reliably.

Change-Id: I3304acb6361a726aa9e365b49ebe23d4f949f978
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>