sfc: Do not read STAT1.FAULT in efx_mdio_check_mmd()

This field does not exist in all MMDs we want to check, and all
callers allow it to be set (fault_fatal = 0).

Remove the loopback condition, as STAT2.DEVPRST should be valid
regardless of any fault.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
diff --git a/drivers/net/sfc/mdio_10g.h b/drivers/net/sfc/mdio_10g.h
index 75791d3..44c5dee 100644
--- a/drivers/net/sfc/mdio_10g.h
+++ b/drivers/net/sfc/mdio_10g.h
@@ -68,8 +68,7 @@
 			      int spins, int spintime);
 
 /* As efx_mdio_check_mmd but for multiple MMDs */
-int efx_mdio_check_mmds(struct efx_nic *efx,
-			unsigned int mmd_mask, unsigned int fatal_mask);
+int efx_mdio_check_mmds(struct efx_nic *efx, unsigned int mmd_mask);
 
 /* Check the link status of specified mmds in bit mask */
 extern bool efx_mdio_links_ok(struct efx_nic *efx, unsigned int mmd_mask);