package/can-utils: add license information

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
[Thomas: use SPDX license codes.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/can-utils/can-utils.mk

@@ -6,6 +6,7 @@
 
 CAN_UTILS_VERSION = c3305fdd515464153d20199db232b6124bc962c0
 CAN_UTILS_SITE = $(call github,linux-can,can-utils,$(CAN_UTILS_VERSION))
+CAN_UTILS_LICENSE = BSD-3-Clause or GPL-2.0, GPL-2.0+
 CAN_UTILS_AUTORECONF = YES
 
 $(eval $(autotools-package))