fs/ntfs3: Make mount option nohidden more universal

If we call Opt_nohidden with just keyword hidden, then we can use
hidden/nohidden when mounting. We already use this method for almoust
all other parameters so it is just logical that this will use same
method.
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Kari Argillander <kari.argillander@gmail.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

fs/ntfs3/super.c

@@ -242,7 +242,7 @@ static const struct fs_parameter_spec ntfs_fs_parameters[] = {
 	fsparam_flag_no("discard",		Opt_discard),
 	fsparam_flag_no("force",		Opt_force),
 	fsparam_flag_no("sparse",		Opt_sparse),
-	fsparam_flag("nohidden",		Opt_nohidden),
+	fsparam_flag_no("hidden",		Opt_nohidden),
 	fsparam_flag_no("acl",			Opt_acl),
 	fsparam_flag_no("showmeta",		Opt_showmeta),
 	fsparam_string("nls",			Opt_nls),
@@ -331,7 +331,7 @@ static int ntfs_fs_parse_param(struct fs_context *fc,
 		opts->sparse = result.negated ? 0 : 1;
 		break;
 	case Opt_nohidden:
-		opts->nohidden = 1;
+		opts->nohidden = result.negated ? 1 : 0;
 		break;
 	case Opt_acl:
 		if (!result.negated)