mosys: migrate out of flashrom deprecated options

This change replaces --fast-verify with the supported equivalent flashrom
option

BUG=b:186479007
TEST=tryjobs

Change-Id: I5640698fe24fe143298b4330b575c71816e83807
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mosys/+/2854174
Tested-by: Daniel Campello <campello@chromium.org>
Commit-Queue: Daniel Campello <campello@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed