Merge pull request #7618 from derf/master

sys: net: ieee802154: add fallthrough comment

sys/include/net/ieee802154.h

@@ -275,6 +275,7 @@ static inline eui64_t *ieee802154_get_iid(eui64_t *eui64, const uint8_t *addr,
             eui64->uint8[0] = addr[i++] ^ 0x02;
             eui64->uint8[1] = addr[i++];
 
+            /* Falls through. */
         case 2:
             eui64->uint8[2] = 0;
             eui64->uint8[3] = 0xff;