Fix regular expression check for vendor name

Some vendor names might include a hyphen (e.g. Hewlett-Packard)

BUG=chrome-os-partner:33045
TEST=firmware_Mosys test on zako

Change-Id: I639fb5ef5359e15f4ecfca8d825aabf0e564a4d7
Reviewed-on: https://chromium-review.googlesource.com/223727
Reviewed-by: Yusuf Mohsinally <mohsinally@chromium.org>
Commit-Queue: Mohammed Habibulla <moch@chromium.org>
Tested-by: Mohammed Habibulla <moch@chromium.org>
1 file changed