meta-digi-dey: Fix ifup script for manual configuration.

The system freezes if we try to set the MAC addresses before the interface
is up, so check the state before doing it.

https://jira.digi.com/browse/DEL-509

Signed-off-by: Alex Gonzalez <alex.gonzalez@digi.com>

meta-digi-dey/recipes-core/netbase/netbase-5.0/ifup

@@ -34,15 +34,19 @@ if [ -h /sys/class/net/eth0 ]; then
             ;;
     esac
     if [ "${macaddr}" ]; then
+        if /sbin/ifconfig eth0 | grep -qs UP; then
             /sbin/ifconfig eth0 hw ether ${macaddr}
         fi
     fi
+fi
 
 if [ -h /sys/class/net/eth1 ]; then
     macaddr=`cat /proc/cmdline | sed 's,\s,\n,g' | awk '/ethaddr3/ {print}' | sed 's,ethaddr3=,,g'`
     if [ "${macaddr}" ]; then
+        if /sbin/ifconfig eth1 | grep -qs UP; then
             /sbin/ifconfig eth1 hw ether ${macaddr}
         fi
     fi
+fi
 
 exit 0