Tighten up security_OpenFDs check for vgem device

With the /dev/dri/vgem symlink, we can remove the whitelist for
explicitly numbered devices.

BUG=chromium:543646
CQ-DEPEND=CL:306761
TEST=test_that link-dut security_OpenFDs

Change-Id: I448b6ae4622f58ec67145c1453187fa8f6fd1701
Reviewed-on: https://chromium-review.googlesource.com/307980
Commit-Ready: Michael Spang <spang@chromium.org>
Tested-by: Michael Spang <spang@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
1 file changed