avl_tool: Fix wp enable usage on ARM/mtd driver

In the case of the MTD driver on ARM platforms we will get;
'For MTD, --wp-range and --wp-enable must be used simultaneously'.
if we do not provide a wp-range with a wp-enable as can be seen from
`static int mtd_wp_enable_writeprotect(const struct flashctx *flash,
enum wp_mode mode)` in linux_mtd.c

BUG=b:139707424
TEST=still builds
BRANCH=None

Change-Id: I860ddf60b92c055a53434a3f9affb3b20bf89337
Signed-off-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/flashrom/+/1768390
Reviewed-by: Peter Marheine <pmarheine@chromium.org>
Reviewed-by: Sam McNally <sammc@chromium.org>
1 file changed