skylake: Wake from Deep S5 after battery low is deasserted
skylake: Wake from Deep S5 after battery low is deasserted

The system will not wake from Deep S5 if BATLOW# is asserted,
so wait for that to deassert, then pulse the wake pin and wait
for SLP_SUS_L to deassert.

BUG=chrome-os-partner:43545,chrome-os-partner:44079
BRANCH=none
TEST=verified on P2 board

Change-Id: I3b36159b574d418c9b79c478d0a41f753474fa6a
Signed-off-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/293595
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

fourier49/BIZ_EC,fourier49/BIZ_EC,fourier49/BIZ_EC,fourier49/BIZ_EC