Add SMB3.02 dialect support

The new Windows update supports SMB3.02 dialect, a minor update to SMB3.
This patch adds support for mounting with vers=3.02

Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 4cb4ced..3da33da 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -170,6 +170,7 @@
 #define SMB20_PROT_ID 0x0202
 #define SMB21_PROT_ID 0x0210
 #define SMB30_PROT_ID 0x0300
+#define SMB302_PROT_ID 0x0302
 #define BAD_PROT_ID   0xFFFF
 
 /* SecurityMode flags */