sfc: Extend loopback mode enumeration

New NICs and PHYs support a wider variety of loopback modes.

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 62b2089..cd2debb 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -824,7 +824,7 @@
 
 	atomic_t rx_reset;
 	enum efx_loopback_mode loopback_mode;
-	unsigned int loopback_modes;
+	u64 loopback_modes;
 
 	void *loopback_selftest;
 };