mtd: add license info

Signed-off-by: Danomi Manchego <danomimanchego123@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mtd/mtd.mk

@@ -6,6 +6,9 @@
 MTD_VERSION = 1.5.0
 MTD_SOURCE = mtd-utils-$(MTD_VERSION).tar.bz2
 MTD_SITE = ftp://ftp.infradead.org/pub/mtd-utils
+MTD_LICENSE = GPLv2
+MTD_LICENSE_FILES = COPYING
+
 ifeq ($(BR2_PACKAGE_MTD_MKFSJFFS2),y)
 MTD_DEPENDENCIES = zlib lzo
 endif