pppd: comma separate licenses

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/pppd/pppd.mk

@@ -7,7 +7,7 @@
 PPPD_VERSION = 2.4.7
 PPPD_SOURCE = ppp-$(PPPD_VERSION).tar.gz
 PPPD_SITE = https://download.samba.org/pub/ppp
-PPPD_LICENSE = LGPLv2+ LGPL BSD-4c BSD-3c GPLv2+
+PPPD_LICENSE = LGPLv2+, LGPL, BSD-4c, BSD-3c, GPLv2+
 PPPD_LICENSE_FILES = \
 	pppd/tdb.c pppd/plugins/pppoatm/COPYING \
 	pppdump/bsd-comp.c pppd/ccp.c pppd/plugins/passprompt.c