lightbar: shrink size of sine table for ramping
lightbar: shrink size of sine table for ramping

cycle_010 now uses a table one-fourth the size and does a small
bit of linear interpolation in order to save space. This change
saves around 350 bytes.

BUG=None
BRANCH=ToT
TEST=manual; inspection that ramping still looks smooth

Signed-off-by: Eric Caruso <ejcaruso@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/220430
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
(cherry picked from commit d747c44dda978acc58458fd5ae84c64054515f22)
Signed-off-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>

Change-Id: Ib5900630ba4a471a6284660377134724070babdc
Reviewed-on: https://chromium-review.googlesource.com/221150
Tested-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Reviewed-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Commit-Queue: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>

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