sfc: get drvinfo driver name from outside the common code

Since ethtool_common.o will be built into both sfc and sfc_ef100 drivers,
 it can't use KBUILD_MODNAME directly.  Instead, make it reference a
 string provided by the individual driver code.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/ethtool.c

@@ -221,6 +221,8 @@ static int efx_ethtool_get_ts_info(struct net_device *net_dev,
 	return 0;
 }
 
+const char *efx_driver_name = KBUILD_MODNAME;
+
 const struct ethtool_ops efx_ethtool_ops = {
 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
 				     ETHTOOL_COALESCE_USECS_IRQ |

drivers/net/ethernet/sfc/ethtool_common.c

@@ -104,7 +104,7 @@ void efx_ethtool_get_drvinfo(struct net_device *net_dev,
 {
 	struct efx_nic *efx = netdev_priv(net_dev);
 
-	strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
+	strlcpy(info->driver, efx_driver_name, sizeof(info->driver));
 	strlcpy(info->version, EFX_DRIVER_VERSION, sizeof(info->version));
 	efx_mcdi_print_fwver(efx, info->fw_version,
 			     sizeof(info->fw_version));

drivers/net/ethernet/sfc/ethtool_common.h

@@ -11,6 +11,8 @@
 #ifndef EFX_ETHTOOL_COMMON_H
 #define EFX_ETHTOOL_COMMON_H
 
+extern const char *efx_driver_name;
+
 void efx_ethtool_get_drvinfo(struct net_device *net_dev,
 			     struct ethtool_drvinfo *info);
 u32 efx_ethtool_get_msglevel(struct net_device *net_dev);