bnx2x: add `ethtool -w' support.

This revises and enhances the bnx2x register dump facilities,
adding support for `ethtool -w' on top of `ethtool -d'.

Signed-off-by: Miriam Shitrit <miris@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x.h

@@ -1704,6 +1704,7 @@ struct bnx2x {
 
 	/* priority to cos mapping */
 	u8					prio_to_cos[8];
+	u32 dump_preset_idx;
 };
 
 /* Tx queues may be less or equal to Rx queues */

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h

@@ -197,6 +197,7 @@ void bnx2x_igu_ack_sb(struct bnx2x *bp, u8 igu_sb_id, u8 segment,
 
 /* Disable transactions from chip to host */
 void bnx2x_pf_disable(struct bnx2x *bp);
+int bnx2x_pretend_func(struct bnx2x *bp, u16 pretend_func_val);
 
 /**
  * bnx2x__link_status_update - handles link status change.