sfc: Rename SPI stuff to show that it is Falcon-specific

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index 8baf6a1..b90dc8a 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -184,8 +184,8 @@
 	bool stats_pending;
 	struct timer_list stats_timer;
 	u32 *stats_dma_done;
-	struct efx_spi_device spi_flash;
-	struct efx_spi_device spi_eeprom;
+	struct falcon_spi_device spi_flash;
+	struct falcon_spi_device spi_eeprom;
 	struct mutex spi_lock;
 	struct mutex mdio_lock;
 	bool xmac_poll_required;