checkpatch: Ignore SPDX_LICENSE_TAG

Vboot doesn't use SPDX license header. The cros_license_check hook
already checks for Chromium license.

BUG=none
TEST=none
BRANCH=none

Change-Id: Ibf222f8a95ce0d1242d7f0fee3a96b85b754fa48
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3139454
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
1 file changed