vboot_ref/cgpt: Use defines for region consts

BUG=b:207808292,b:220079643
BRANCH=none
TEST=`make cgpt`

Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Change-Id: I367e44eed18c79a807bd428e50a3faf926833719
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3461097
Auto-Submit: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Nikolai Artemiev <nartemiev@google.com>
Tested-by: Edward O'Callaghan <quasisec@chromium.org>
Commit-Queue: Edward O'Callaghan <quasisec@chromium.org>
1 file changed