Note that this only handles lid and power button; see
crosbug.com/p/8325 for write protect.
Signed-off-by: Randall Spangler <rspangler@chromium.org>
BUG=chrome-os-partner:8185
TEST=manual
1. Check state with lid open
localhost ~ # ectool switches
Current switches: 0x01
Lid switch: OPEN
Power button: UP
Write protect: ENABLED
2. Press power button
localhost ~ # ectool switches
Current switches: 0x03
Lid switch: OPEN
Power button: DOWN
Write protect: ENABLED
3. Release power button and close lid
localhost ~ # ectool switches
Current switches: 0x00
Lid switch: CLOSED
Power button: UP
Write protect: ENABLED
Change-Id: I25f2fa3dfeac004dde9b10a4243ee235875f1b6e