amdfwtool: Use a variable to get the return value of write

New Jenkins complaint about the original code that return
value gets to nowhere. Fix that with a new variable.

Change-Id: I8099b856ccb751dc380d0e95f5fe319cc3e2c6cc
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45812
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions