sfc: Add efx_nic_type operation for register self-test

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index 58bf761..9d353d9 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -864,6 +864,7 @@
  * @get_wol: Get WoL configuration from driver state
  * @set_wol: Push WoL configuration to the NIC
  * @resume_wol: Synchronise WoL state between driver and MC (e.g. after resume)
+ * @test_registers: Test read/write functionality of control registers
  * @default_mac_ops: efx_mac_operations to set at startup
  * @revision: Hardware architecture revision
  * @mem_map_size: Memory BAR mapped size
@@ -902,6 +903,7 @@
 	void (*get_wol)(struct efx_nic *efx, struct ethtool_wolinfo *wol);
 	int (*set_wol)(struct efx_nic *efx, u32 type);
 	void (*resume_wol)(struct efx_nic *efx);
+	int (*test_registers)(struct efx_nic *efx);
 	struct efx_mac_operations *default_mac_ops;
 
 	int revision;