Summary: - I noticed that the latest ifconfig command shows nothing - Finally, I found that gs2200m.c needs to handle SIOCGIFFLAGS - This commit fixes this issue Impact: - gs2200m only Testing: - Tested with spresense:wifi - NOTE: gs2200m_main.c will be updated later Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>