Add a section explaining how the detect feature works and when it should
be used.
Change-Id: Ife5178d4565e76d0ff436c835c9c47525015c3ed
Signed-off-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67763
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
0208b51215
