Local loopback: Set the IFF_UP flags during initialization because the local...

Local loopback:  Set the IFF_UP flags during initialization because the local loopback device is always up

Documentation @ ce750c08

-Subproject commit 8a30728ae9a64496f0c9a0ff5dd62bd3b022c145
+Subproject commit ce750c0899c2138b37b52a48d020a3eceb92fd04

configs @ e3f37812

-Subproject commit e1e1873700ffda7aeb632e2b1234333d88ce3457
+Subproject commit e3f37812a9a7595a7ddab1a625ebe857d104beb2

drivers/net/loopback.c

@@ -49,6 +49,7 @@
 #include <debug.h>
 
 #include <arpa/inet.h>
+#include <net/if.h>
 
 #include <nuttx/arch.h>
 #include <nuttx/irq.h>
@@ -532,13 +533,16 @@ int localhost_initialize(void)
   net_ipv4addr_copy(priv->lo_dev.d_draddr, g_lo_ipv4addr);
   net_ipv4addr_copy(priv->lo_dev.d_netmask, g_lo_ipv4mask);
 #endif
+
 #ifdef CONFIG_NET_IPv6
  net_ipv6addr_copy(priv->lo_dev.d_ipv6addr, g_lo_ipv6addr);
  net_ipv6addr_copy(priv->lo_dev.d_ipv6draddr, g_lo_ipv6addr);
  net_ipv6addr_copy(priv->lo_dev.d_ipv6netmask, g_ipv6_alloneaddr);
 #endif
+
   /* Put the network in the UP state */
 
+  priv->lo_dev.d_flags = IFF_UP;
   return lo_ifup(&priv->lo_dev);
 }