ksmbd: set FILE_NAMED_STREAMS attribute in FS_ATTRIBUTE_INFORMATION

If vfs objects = streams_xattr in ksmbd.conf FILE_NAMED_STREAMS should
be set to Attributes in FS_ATTRIBUTE_INFORMATION. MacOS client show
"Format: SMB (Unknown)" on faked NTFS and no streams support.

Cc: stable@vger.kernel.org
Reported-by: Miao Lihua <441884205@qq.com>
Tested-by: Miao Lihua <441884205@qq.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>