make_dev_ssd.sh: Update grub defaultA and defaultB
make_dev_ssd.sh: Update grub defaultA and defaultB

Update the defaultA=2 and defaultB=3 grub settings to
remove verification.
In change I930d0f3f1a3f8f54edd1dce7f8259e3c261af9a1 the default
options for grub were changed to be defaultA and defaultB instead
of 'set default=2'. Update the removal to support these new
configuration settings.

BRANCH=none
BUG=b:186240229
TEST=on a reven build run `/usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification
--force`; reboot and confirm verity is disabled

Change-Id: I70ceed432c29865715c525a6ae13f0e7da8ee0ba
Signed-off-by: Jeffery Miller <72898062516b412a78103ed3b8d6cfeb622c88da@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3445175
Reviewed-by: Nicholas Bishop <6c97ad57acdc3ef121d42022bbc5826e3a51ac7c@google.com>
Reviewed-by: Hung-Te Lin <8a7fce4940baad93a69f5073b383c85deed9d9c4@chromium.org>
Commit-Queue: Nicholas Bishop <6c97ad57acdc3ef121d42022bbc5826e3a51ac7c@google.com>

coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot