modemmanager: allow empty initial EPS bearer APN

This commit removes the non-empty APN requirement for initial EPS
bearer. An empty APN value is valid and means that the modem will use a
network provided APN offered by the operator.

Signed-off-by: Simonas Tamošaitis <simsasss@gmail.com>

net/modemmanager/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=modemmanager
 PKG_VERSION:=1.24.0
-PKG_RELEASE:=7
+PKG_RELEASE:=8
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://gitlab.freedesktop.org/mobile-broadband/ModemManager.git

net/modemmanager/files/lib/netifd/proto/modemmanager.sh

@@ -526,13 +526,6 @@ modemmanager_init_epsbearer() {
 	local connectargs="$3"
 	local apn="$4"
 
-	[ "$eps" != 'none' ] && [ -z "${apn}" ] && {
-		echo "No '$eps' init eps bearer apn configured"
-		proto_notify_error "${interface}" MM_INIT_EPS_BEARER_APN_NOT_CONFIGURED
-		proto_block_restart "${interface}"
-		return 1
-	}
-
 	if [ "$eps" = "none" ]; then
 		echo "Deleting inital EPS bearer..."
 	else