samus: Cap the max LED current to 23mA
samus: Cap the max LED current to 23mA

Samus panels are spec'ed at 23mA max LED current. Limit the max
current to that.

BRANCH=samus
BUG=chrome-os-partner:35816
TEST=The following command should read back the value of 0x4 after
system boot, resume as well as after panel off/on sequence:
ectool --dev=0 i2cread 8 0 0x58 0x11

Signed-off-by: Sameer Nanda <snanda@chromium.org>

Reviewed-on: https://chromium-review.googlesource.com/242971
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
Reviewed-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Tested-by: Sameer Nanda <snanda@chromium.org>
Commit-Queue: Sameer Nanda <snanda@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
(cherry picked from commit d5a61288137b26c3fa4e52e0eb0ff621ffb36807)
Signed-off-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>

Change-Id: I8f94a8bdc987ca5169ca3b6f8236ab7263ee4ef2
Reviewed-on: https://chromium-review.googlesource.com/243302
Reviewed-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Commit-Queue: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Trybot-Ready: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Tested-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>

thehobn/ec,thehobn/ec,thehobn/ec,thehobn/ec