futility: Print programmer in logs

Print the programmer name in load_system_firmware() and
write_system_firmware() logs. This would help differentiate between AP
and EC errors.

Also add a log in update_ec_firmware(), and a warning in
dut_get_wp_sw().

BUG=b:479521993
TEST=make futil -j
BRANCH=none

Change-Id: I32b8fa43becebd3388025d884fa61b00eddfcdc5
Signed-off-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/7532376
Tested-by: Yu-Ping Wu <yupingso@chromium.org>
Auto-Submit: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-by: Hsuan Ting Chen <roccochen@chromium.org>
Commit-Queue: Hsuan Ting Chen <roccochen@chromium.org>
3 files changed