NFS: Create NFS_ACCESS_* flags

Passing the NFS v4 flags into the v3 code seems weird to me, even if
they are defined to the same values.  This patch adds in generic flags
to help me feel better

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

include/linux/nfs_fs.h

@@ -183,6 +183,16 @@ struct nfs_inode {
 	struct inode		vfs_inode;
 };
 
+/*
+ * Access bit flags
+ */
+#define NFS_ACCESS_READ        0x0001
+#define NFS_ACCESS_LOOKUP      0x0002
+#define NFS_ACCESS_MODIFY      0x0004
+#define NFS_ACCESS_EXTEND      0x0008
+#define NFS_ACCESS_DELETE      0x0010
+#define NFS_ACCESS_EXECUTE     0x0020
+
 /*
  * Cache validity bit flags
  */