wireless: gs2200m: Add support for ioctl(fd, SIOCGIFADDR, ...)

Summary:
- This commit adds support for ioctl(fd, SIOCGIFADDR, ...) to gs2200m_main.c

Impact:
- Only affects ioctl(fd, SIOCGIFADDR, ...) with gs2200m
- Need to update nuttx as well

Testing:
- Tested with spresense:wifi
- Tested with dhcpc

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

wireless/gs2200m/gs2200m_main.c

@@ -1516,6 +1516,7 @@ static int ioctl_request(int fd, FAR struct gs2200m_s *priv,
 
   switch (req->cmd)
     {
+      case SIOCGIFADDR:
       case SIOCGIFHWADDR:
         getreq = true;
         break;