sfc: Don't use enums as a bitmask.

This fixes:

drivers/net/sfc/mcdi_mac.c: In function ‘efx_mcdi_set_mac’:
drivers/net/sfc/mcdi_mac.c:36:2: warning: case value ‘3’ not in enumerated type ‘enum efx_fc_type’

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/mdio_10g.h b/drivers/net/sfc/mdio_10g.h
index df07039..a97dbbd 100644
--- a/drivers/net/sfc/mdio_10g.h
+++ b/drivers/net/sfc/mdio_10g.h
@@ -92,7 +92,7 @@
 /* Get pause parameters from AN if available (otherwise return
  * requested pause parameters)
  */
-enum efx_fc_type efx_mdio_get_pause(struct efx_nic *efx);
+u8 efx_mdio_get_pause(struct efx_nic *efx);
 
 /* Wait for specified MMDs to exit reset within a timeout */
 extern int efx_mdio_wait_reset_mmds(struct efx_nic *efx,