dediprog: Skip warning on first attempt to read device string

It's spurious on the first attempt as older devices are supposed to fail
on the first try. Only print the error if the second attempt fails.

Tested with "SF100   V:5.1.9".

Change-Id: I725df8f26e3432295a3fc521390f391c062b4e14
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/106
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
1 file changed