Adds Refresh Rate to fw_dut_info.go

BUG=b:326315770
TEST=manual (go run fw_dut_info.go $HOST)

Change-Id: Ibc86548de1dc4c9a4115d325e28c156cf5303d75
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/5338006
Reviewed-by: Andrew Luo <aluo@chromium.org>
Tested-by: Sean Carpenter <seancarpenter@google.com>
Commit-Queue: Sean Carpenter <seancarpenter@google.com>
1 file changed