regulator: cpr3-regulator: support per-CPR3 regulator mem-acc settings

Support configuration of mem-acc regulators controlled per CPR3
regulator device. The mem-acc configuration may depend upon
the LDO regulators associated with each CPR3 regulator device.
Thus, add support to request the appropriate mem-acc regulator
corner based upon LDO regulator state.

Change-Id: I4813c968582a300cbebb6417e8feae1b391b5438
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>