dediprog.c: Add id parameter to dediprog programmer

When multiple dediprog programmers are connected, the 'id' parameter
allows you to specify which one to use. The id is a string like SF012345
or DP012345. The value is printed on a sticker on the back of the dediprog.

This is an improvement over the 'device' parameter which is based on
enumeration order and changes when you plug/unplug devices or reboot the
machine.

To find the id without the sticker, run flashrom with the -V option.
This prints the ids as they are enumerated.  Alternatively, with dpcmd,
you can use the --list-device-id and --fix-device commands to list and
write device ids respectively.

Note this only supports SF100 at the moment, but SF600 support is
possible with more work.

Change-Id: I4281213ab02131feb5d47bf66118a001cec0d219
Signed-off-by: Ryan O'Leary <ryanoleary@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/34160


Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>