lm4: Increase time to wake up from deep sleep
lm4: Increase time to wake up from deep sleep

The recent change to decrease the time to wake up from deep sleep when
not using LFIOSC was too agressive. Increase the time to wake up based
upon the worst observed case.

BUG=chrome-os-partner:35184
TEST=Manual on Samus. Go to deep sleep, verify that no "overslept by
Xus" prints are seen.
BRANCH=Samus

Change-Id: Ib9fe2eba5e29a112e03fffaedbc5ae53d6d650ff
Signed-off-by: Shawn Nematbakhsh <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/239242
Reviewed-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>
Commit-Queue: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>
Tested-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>

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