snappy: limit max input current for safety
snappy: limit max input current for safety

Max = Max * 89%

BUG=none
BRANCH=reef
TEST=make buildall

Change-Id: I7c37ce8ca25411b9c29f33e18899ccddd5b5979b
Signed-off-by: Bruce.Wan <a898a81068da7266439365c3bd380deb6a0a895f@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/438205
Commit-Ready: Bruce Wan <a898a81068da7266439365c3bd380deb6a0a895f@quantatw.com>
Tested-by: Bruce Wan <a898a81068da7266439365c3bd380deb6a0a895f@quantatw.com>
Reviewed-by: Aaron Durbin <af0622ab041e8b0f8e5819838dcc93898196e71f@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec