ixgbe: Support external GBE SerDes PHY BCM54616s

The Broadcom PHY is used in switches, so add the ID, and hook it up.

This upstreams the Linux kernel patch from the network operating system
SONiC from February 2020 [1].

[1]: sonic-net/sonic-linux-kernel#122

Signed-off-by: Jostar Yang <[email protected]>
Signed-off-by: Guohan Lu <[email protected]>
Signed-off-by: Paul Menzel <[email protected]>

Author: jostar-yang

drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c

@@ -380,6 +380,9 @@ static enum ixgbe_phy_type ixgbe_get_phy_type_from_id(u32 phy_id)
 	case X557_PHY_ID2:
 		phy_type = ixgbe_phy_x550em_ext_t;
 		break;
+	case BCM54616S_E_PHY_ID:
+		phy_type = ixgbe_phy_ext_1g_t;
+		break;
 	default:
 		phy_type = ixgbe_phy_unknown;
 		break;

drivers/net/ethernet/intel/ixgbe/ixgbe_type.h

@@ -1407,6 +1407,7 @@ struct ixgbe_nvm_version {
 #define QT2022_PHY_ID    0x0043A400
 #define ATH_PHY_ID       0x03429050
 #define AQ_FW_REV        0x20
+#define BCM54616S_E_PHY_ID 0x03625D10
 
 /* Special PHY Init Routine */
 #define IXGBE_PHY_INIT_OFFSET_NL 0x002B