Change in flashrom[staging]: Fix linking with libpayload

[Nico Huber (Code Review)]

Hello Philippe Mathieu-Daudé, Paul Menzel, David Hendricks, Stefan Reinauer, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/18738

to look at the new patch set (#15).

Change subject: Fix linking with libpayload
......................................................................

Fix linking with libpayload

o Move flashbuses_to_text() to flashrom.c, it's not a cli function.
o Guard `!defined(HAVE_STRNLEN)`. This guard was introduced in
  23e10b87 (Add a bunch of new/tested stuff and various small
  changes 24) to support older BSDs. It's probably completely
  broken because HAVE_STRNLEN is presumably a GNU autotools
  thing. But we can't fix it without retesting these older BSDs.

Change-Id: I561135209b819361d125eeaeef9ff886d6bae987
Signed-off-by: Nico Huber 
---
M cli_common.c
M flash.h
M flashrom.c
M helpers.c
4 files changed, 36 insertions(+), 37 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/38/18738/15