pit: set up the PMIC correctly

This updates the setup_power() function to actually set up the PMIC
which is on this board (the MAX77802).

BUG=chrome-os-partner:19420
BRANCH=none
TEST=TODO...

Change-Id: I686740cc34e40256c6607132ec7a94d5156b5d55
Reviewed-on: https://gerrit.chromium.org/gerrit/58763
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
2 files changed