cifs: Fix typo 'CIFS_NFSD_EXPORT'

It should be 'CONFIG_CIFS_NFSD_EXPORT'. No-one noticed because that
symbol depends on BROKEN.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/export.c b/fs/cifs/export.c
index 55d87ac..9c7ecdc 100644
--- a/fs/cifs/export.c
+++ b/fs/cifs/export.c
@@ -45,7 +45,7 @@
 #include "cifs_debug.h"
 #include "cifsfs.h"
 
-#ifdef CIFS_NFSD_EXPORT
+#ifdef CONFIG_CIFS_NFSD_EXPORT
 static struct dentry *cifs_get_parent(struct dentry *dentry)
 {
 	/* BB need to add code here eventually to enable export via NFSD */
@@ -63,5 +63,5 @@
 	.encode_fs =  */
 };
 
-#endif /* CIFS_NFSD_EXPORT */
+#endif /* CONFIG_CIFS_NFSD_EXPORT */