sfc: Make PHY flash mode a device attribute, not a module parameter

This allows updating PHY firmware for one interface without removing
all other interfaces handled by the driver.

Replace tx_disabled flags and 10Xpress status enumeration with flags in
enum efx_phy_mode.

Prevent an interface from being brought up while in PHY flash mode.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/sfc/mdio_10g.c b/drivers/net/sfc/mdio_10g.c
index 4064946..003e48d 100644
--- a/drivers/net/sfc/mdio_10g.c
+++ b/drivers/net/sfc/mdio_10g.c
@@ -172,6 +172,8 @@
 		return true;
 	else if (efx->loopback_mode == LOOPBACK_NETWORK)
 		return false;
+	else if (efx_phy_mode_disabled(efx->phy_mode))
+		return false;
 	else if (efx->loopback_mode == LOOPBACK_PHYXS)
 		mmd_mask &= ~(MDIO_MMDREG_DEVS0_PHYXS |
 			      MDIO_MMDREG_DEVS0_PCS |
@@ -206,7 +208,7 @@
 
 	ctrl1 = ctrl2 = mdio_clause45_read(efx, phy_id, MDIO_MMD_PMAPMD,
 					   MDIO_MMDREG_TXDIS);
-	if (efx->tx_disabled)
+	if (efx->phy_mode & PHY_MODE_TX_DISABLED)
 		ctrl2 |= (1 << MDIO_MMDREG_TXDIS_GLOBAL_LBN);
 	else
 		ctrl1 &= ~(1 << MDIO_MMDREG_TXDIS_GLOBAL_LBN);