X87: split api call stubs into accessor and function call stubs

X87: split api call stubs into accessor and function call stubs

port 6950ead0b0a8373441dc8f8d3b2c316e82549ce9

original commit message:

  split api call stubs into accessor and function call stubs

BUG=

Committed: https://crrev.com/f7e92b037bdcfb9b8108b86f938e700e6e0a8c12
Cr-Commit-Position: refs/heads/master@{#26122}

[chunyang.dai, 2015-01-19 03:01:44]

chunyang.dai@intel.com changed reviewers:
+ dcarney@chromium.org, weiliang.lin@intel.com

[chunyang.dai, 2015-01-19 03:02:01]

WL.
PTAL.

[Weiliang, 2015-01-19 03:32:25]

lgtm

[chunyang.dai, 2015-01-19 04:42:05]

The CQ bit was checked by chunyang.dai@intel.com

[commit-bot: I haz the power, 2015-01-19 04:42:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/860593002/1

[commit-bot: I haz the power, 2015-01-19 05:06:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-19 05:06:47]

Patchset 1 (id:??) landed as
https://crrev.com/f7e92b037bdcfb9b8108b86f938e700e6e0a8c12
Cr-Commit-Position: refs/heads/master@{#26122}