[LICENSE] Add SPDX Identifier
diff --git a/spi/lvs/run_lvs.sh b/spi/lvs/run_lvs.sh
index 8d898a2..af4c349 100644
--- a/spi/lvs/run_lvs.sh
+++ b/spi/lvs/run_lvs.sh
@@ -12,6 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 
 NETGEN_SETUP=$PDK_ROOT/sky130A/libs.tech/netgen/sky130A_setup.tcl