writeprotect.c: Assist debug with fn name prefix

It is helpful to know which one of the three possible
functions failed with the same error message.

BUG=b:150746858
BRANCH=none
TEST=builds

Change-Id: I56c98d0a6d9cda08e73327c1caa716261594779d
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/flashrom/+/2123651
Commit-Queue: Edward O'Callaghan <quasisec@chromium.org>
Commit-Queue: Sam McNally <sammc@chromium.org>
Tested-by: Edward O'Callaghan <quasisec@chromium.org>
Auto-Submit: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Sam McNally <sammc@chromium.org>
Reviewed-by: Stuart Langley <slangley@chromium.org>
1 file changed