flash_ec: remove verify-whole option for npcx_(int_)spi
flash_ec: remove verify-whole option for npcx_(int_)spi

This patch removes the verification of the whole firmware area for
npcx_spi and npcx_int_spi chip. The reason is flash_ec programs WP_RO
and EC_RW area only so it should verify partially on those area only,
not the whole area. The option "--fast-verify" already was used for that
purpose in flash_ec script.

BUG=b:158864362
BRANCH=none
TEST=ran flash_ec on nami.

Signed-off-by: Namyoon Woo <e8732cefb861f07768f47df788a8e8eb75efc09a@google.com>
Change-Id: If08194697e1b15b13c592be94d5268359edd6b5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2254739
Tested-by: Namyoon Woo <e8732cefb861f07768f47df788a8e8eb75efc09a@chromium.org>
Reviewed-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>
Commit-Queue: Namyoon Woo <e8732cefb861f07768f47df788a8e8eb75efc09a@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec