stmmac: update the driver version and doc (V4)

4.5) DMA descriptors

Driver handles both normal and enhanced descriptors. The latter has been only

tested on DWC Ether MAC 10/100/1000 Universal version 3.41a.

tested on DWC Ether MAC 10/100/1000 Universal version 3.41a and later.

STMMAC supports DMA descriptor to operate both in dual buffer (RING)

and linked-list(CHAINED) mode. In RING each descriptor points to two

data buffer pointers whereas in CHAINED mode they point to only one data

buffer pointer. RING mode is the default.

In CHAINED mode each descriptor will have pointer to next descriptor in

the list, hence creating the explicit chaining in the descriptor itself,

whereas such explicit chaining is not possible in RING mode.

4.6) Ethtool support

Ethtool is supported. Driver statistics and internal errors can be taken using:

  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>

*******************************************************************************/

#define DRV_MODULE_VERSION	"Aug_2011"

#define DRV_MODULE_VERSION	"Oct_2011"

#include <linux/stmmac.h>

#include "common.h"