cli, manpage: Clean up occurrences of old image argument

--include argument was introduced and replaced --image argument in
commit 45d50a101e8073191e6d88143990ed91d3bfe815

This patch cleans up remaining few places where old `--image`
argument was mentioned so that now all the documentation has
`--include`. --image is deprecated.

Both old --image and new --include have the same short version -i
and it remains the same. The code remains the same since the code
handles --include already.

Tested by running
flashrom -h
man ./flashrom.8.tmpl

Ticket: https://ticket.coreboot.org/issues/372

Original-Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/70003
Original-Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Original-Reviewed-by: Felix Singer <felixsinger@posteo.net>
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
(cherry picked from commit 8274c6321ae2ff29bc9eb0de9dc32d289d3c2cc5)

Change-Id: If457e2b8548034868105b515125d7e8b4d5f6134
Signed-off-by: Evan Benn <evanbenn@google.com>
---
M cli_classic.c
M flashrom.8.tmpl
2 files changed, 39 insertions(+), 3 deletions(-)