sh_eth: get rid of 'sh_eth_cpu_data::shift_rd0'

After checking all  the available manuals,  I have enough information to
conclude  that the 'shift_rd0' flag is only relevant  for the Ether cores
supporting so called "intelligent checksum" (and hence having CSMR) which
is indicated  by the 'hw_crc' flag.  Since  all the relevant SoCs now have
both these flags set, we can  at last  get  rid of the former flag...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/sh_eth.c

@@ -537,7 +537,6 @@ static struct sh_eth_cpu_data r7s72100_data = {
 	.no_ade		= 1,
 	.hw_crc		= 1,
 	.tsu		= 1,
-	.shift_rd0	= 1,
 };
 
 static void sh_eth_chip_reset_r8a7740(struct net_device *ndev)
@@ -577,7 +576,6 @@ static struct sh_eth_cpu_data r8a7740_data = {
 	.hw_crc		= 1,
 	.tsu		= 1,
 	.select_mii	= 1,
-	.shift_rd0	= 1,
 };
 
 /* There is CPU dependent code */
@@ -816,7 +814,6 @@ static struct sh_eth_cpu_data sh7734_data = {
 	.tsu		= 1,
 	.hw_crc		= 1,
 	.select_mii	= 1,
-	.shift_rd0	= 1,
 };
 
 /* SH7763 */
@@ -1416,7 +1413,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
 		 * the RFS bits are from bit 25 to bit 16. So, the
 		 * driver needs right shifting by 16.
 		 */
-		if (mdp->cd->shift_rd0)
+		if (mdp->cd->hw_crc)
 			desc_status >>= 16;
 
 		skb = mdp->rx_skbuff[entry];

drivers/net/ethernet/renesas/sh_eth.h

@@ -490,7 +490,6 @@ struct sh_eth_cpu_data {
 	unsigned no_ade:1;	/* E-DMAC DO NOT have ADE bit in EESR */
 	unsigned hw_crc:1;	/* E-DMAC have CSMR */
 	unsigned select_mii:1;	/* EtherC have RMII_MII (MII select register) */
-	unsigned shift_rd0:1;	/* shift Rx descriptor word 0 right by 16 */
 	unsigned rmiimode:1;	/* EtherC has RMIIMODE register */
 	unsigned rtrate:1;	/* EtherC has RTRATE register */
 };