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/tenxpress.c b/drivers/net/sfc/tenxpress.c
index f102912..581911f 100644
--- a/drivers/net/sfc/tenxpress.c
+++ b/drivers/net/sfc/tenxpress.c
@@ -196,7 +196,7 @@
 		if (rc < 0)
 			return rc;
 
-		rc = efx_mdio_check_mmds(efx, TENXPRESS_REQUIRED_DEVS, 0);
+		rc = efx_mdio_check_mmds(efx, TENXPRESS_REQUIRED_DEVS);
 		if (rc < 0)
 			return rc;
 	}