gaia: notify chipset pre-init hook before turning on AP
gaia: notify chipset pre-init hook before turning on AP

This notifies the CHIPSET_PRE_INIT hook before turning on
the AP.

Signed-off-by: David Hendricks <3b0deacc4b5357f519084f1ea34bd42bf5d34545@chromium.org>
BRANCH=snow
BUG=chrome-os-partner:13315
TEST=tested in subsequent CL

Change-Id: Ic2bc17ed2b561f640af53970d291e5d04d2f72e7
Reviewed-on: https://gerrit.chromium.org/gerrit/31739
Reviewed-by: Charlie Mooney <c4f45ade001857f07012a75265a97cb07f1531f2@chromium.org>
Reviewed-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>
Commit-Ready: David Hendricks <3b0deacc4b5357f519084f1ea34bd42bf5d34545@chromium.org>
Tested-by: David Hendricks <3b0deacc4b5357f519084f1ea34bd42bf5d34545@chromium.org>

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