avl_tool: replace `mosys smbios info` with dmidecode The former is being removed from mosys, and we can easily get the same information from machine DMI. BUG=b:143649265 TEST=cargo test BRANCH=None Change-Id: I9d9391855c88a5592941400fa973de6eb0fe268a Signed-off-by: Peter Marheine <pmarheine@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/flashrom/+/1938107 Commit-Queue: Nicolas Boichat <drinkcat@chromium.org> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>