cifs: fix misspelling of "forcedirectio"

...and add a "directio" synonym since that's what the manpage has
always advertised.

Acked-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 5dcc551..e0b56d7 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -164,7 +164,8 @@
 	{ Opt_sign, "sign" },
 	{ Opt_seal, "seal" },
 	{ Opt_direct, "direct" },
-	{ Opt_direct, "forceddirectio" },
+	{ Opt_direct, "directio" },
+	{ Opt_direct, "forcedirectio" },
 	{ Opt_strictcache, "strictcache" },
 	{ Opt_noac, "noac" },
 	{ Opt_fsc, "fsc" },