rambi: Set LED colors based on battery and chipset state
rambi: Set LED colors based on battery and chipset state

Picked some reasonable values.  Subject to later tweaking.

BUG=chrome-os-partner:23634
BRANCH=none
TEST=On AC power, charging = yellow
     On AC power, done charging = green
     No battery = blinking red
     On battery, AP on = dim green
     On battery, AP off = off

Change-Id: I2eb901ea4de98fec8cd83e403d6ed8a06a2a9ca9
Signed-off-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/174778
Reviewed-by: Dave Parker <a0cbe8131c36e5e74e2155ca4ce91517847db706@chromium.org>

coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,gelraen/cros-ec,coreboot/chrome-ec,gelraen/cros-ec,mtk09422/chromiumos-platform-ec,alterapraxisptyltd/chromium-ec,eatbyte/chromium-ec,alterapraxisptyltd/chromium-ec,fourier49/BIZ_EC,alterapraxisptyltd/chromium-ec,eatbyte/chromium-ec,fourier49/BZ_DEV_EC,thehobn/ec,eatbyte/chromium-ec,coreboot/chrome-ec,fourier49/BZ_DEV_EC,gelraen/cros-ec,fourier49/BIZ_EC,thehobn/ec,md5555/ec,longsleep/ec,longsleep/ec,fourier49/BIZ_EC,fourier49/BZ_DEV_EC,coreboot/chrome-ec,coreboot/chrome-ec,md5555/ec,gelraen/cros-ec,fourier49/BZ_DEV_EC,md5555/ec,md5555/ec,mtk09422/chromiumos-platform-ec,alterapraxisptyltd/chromium-ec,fourier49/BIZ_EC,mtk09422/chromiumos-platform-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,longsleep/ec,thehobn/ec,coreboot/chrome-ec,thehobn/ec,mtk09422/chromiumos-platform-ec,eatbyte/chromium-ec,longsleep/ec