Add InvalidArgument error for MAC Address

sdbusplus now supports errors on properties.

Change-Id: Ia70bb6b9c52dc60ecf549e5b5209848a3cb0bfda
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/xyz/openbmc_project/Network/MACAddress.interface.yaml b/xyz/openbmc_project/Network/MACAddress.interface.yaml
index 5585338..96f4177 100644
--- a/xyz/openbmc_project/Network/MACAddress.interface.yaml
+++ b/xyz/openbmc_project/Network/MACAddress.interface.yaml
@@ -6,4 +6,5 @@
       type: string
       description: >
           MAC address of the ethernet interface.
-
+      errors:
+        - xyz.openbmc_project.Common.Error.InvalidArgument