Update P400 buildbot name / device ID with card update complete

We updated the Quadro M2000 machines to P400s, need to update the
expected device IDs.

BUG=703281
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
NOTRY=true

Review-Url: https://codereview.chromium.org/2761173003
Cr-Original-Commit-Position: refs/heads/master@{#458570}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 2665368b5aeaa70dbc5d6f270a202e9b4c98d6b6
1 file changed