[S] Change in flashrom[main]: Split usbdev declarations to a separate header.

[Antonio Vázquez Blanco (Code Review)]

Attention is currently required from: Antonio Vázquez Blanco.

Hello Miklós Márton, build bot (Jenkins),

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

https://review.coreboot.org/c/flashrom/+/84982?usp=email

to look at the new patch set (#2).

Change subject: Split usbdev declarations to a separate header.
......................................................................

Split usbdev declarations to a separate header.

This is a simple refactor that aims to simplify maintenance and to clarify file dependency inside the project.
Currently, most of the declarations reside in programmer.h making it difficult to really understand file dependency.

Change-Id: I9d819ea1c5bd51289d02189c1dff367ce6d25617
Signed-off-by: Antonio Vázquez Blanco 
---
M dediprog.c
M developerbox_spi.c
M include/programmer.h
A include/usbdev.h
M stlinkv3_spi.c
M usbdev.c
6 files changed, 34 insertions(+), 11 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/82/84982/2