storage_info: Add extcsd data for eMMC device

CQ-DEPEND=CL:188643
BUG=chromium:348147
TEST=Tested in daisy/peach_pit.
chrome://system page show correct result.

Change-Id: I386ebf11af870245fc02216bf99d03ed99071834
Reviewed-on: https://chromium-review.googlesource.com/188384
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Commit-Queue: Puthikorn Voravootivat <puthik@chromium.org>
Tested-by: Puthikorn Voravootivat <puthik@chromium.org>
1 file changed
tree: 43f62a575c6dba861e7b0e9b14fd550d80487303
  1. LICENSE
  2. etc/
  3. inherit-review-settings-ok
  4. init/
  5. scripts/
  6. test/