writeprotect: finish the w25x40 table

This adds a few missing entries to the writeprotect table for the
Winbond W25X40. I could only find two variants of the chip, -CV and
-CL, both of which had a compatible range of protect bits.

BUG=none
BRANCH=none
TEST=none

Change-Id: Ifa630e537be5667ee30086cc2f1a343e704abf4c
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/353810
Reviewed-by: Souvik Ghosh <souvikghosh@google.com>
1 file changed