power: qpnp-qg: Re-arrange the cutoff-voltage based SOC logic

Move the cutoff-voltage based SOC-hold logic after all
the SOC scaling features for it to be the last/final SOC
adjustment logic.

Change-Id: I5da1cf368d523768d0b267b314394612934a6203
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>