powerpc/mpc85xx:Add support of B4420 SoC

B4420 is a reduced personality of B4860 with fewer core/clusters(both SC3900
and e6500), fewer DDR controllers, fewer serdes lanes, fewer SGMII interfaces and
reduced target frequencies.

Key differences between B4860 and B4420
----------------------------------------
B4420 has:
1. Fewer e6500 cores: 1 cluster with 2 e6500 cores
2. Fewer SC3900 cores/clusters: 1 cluster with 2 SC3900 cores per cluster.
3. Single DDRC
4. 2X 4 lane serdes
5. 3 SGMII interfaces
6. no sRIO
7. no 10G

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/arch/powerpc/cpu/mpc85xx/b4860_serdes.c b/arch/powerpc/cpu/mpc85xx/b4860_serdes.c
index 0028280..bd32342 100644
--- a/arch/powerpc/cpu/mpc85xx/b4860_serdes.c
+++ b/arch/powerpc/cpu/mpc85xx/b4860_serdes.c
@@ -31,6 +31,7 @@
 	u8 lanes[SRDS_MAX_LANES];
 };
 
+#ifdef CONFIG_PPC_B4860
 static struct serdes_config serdes1_cfg_tbl[] = {
 	/* SerDes 1 */
 	{0x0D, {CPRI8, CPRI7, CPRI6, CPRI5,
@@ -128,6 +129,50 @@
 		XAUI_FM1_MAC10, XAUI_FM1_MAC10}},
 	{}
 };
+#endif
+
+#ifdef CONFIG_PPC_B4420
+static struct serdes_config serdes1_cfg_tbl[] = {
+	{0x0D, {NONE, NONE, CPRI6, CPRI5,
+		CPRI4, CPRI3, NONE, NONE} },
+	{0x0E, {NONE, NONE, CPRI8, CPRI5,
+		CPRI4, CPRI3, NONE, NONE} },
+	{0x0F, {NONE, NONE, CPRI6, CPRI5,
+		CPRI4, CPRI3, NONE, NONE} },
+	{0x18, {NONE, NONE,
+		SGMII_FM1_DTSEC3, SGMII_FM1_DTSEC4,
+		NONE, NONE, NONE, NONE} },
+	{0x1B, {NONE, NONE,
+		SGMII_FM1_DTSEC3, SGMII_FM1_DTSEC4,
+		NONE, NONE, NONE, NONE} },
+	{0x1E, {NONE, NONE, AURORA, AURORA,
+		NONE, NONE, NONE, NONE} },
+	{0x21, {NONE, NONE, AURORA, AURORA,
+		NONE, NONE, NONE, NONE} },
+	{0x3E, {NONE, NONE, CPRI6, CPRI5,
+		CPRI4, CPRI3, NONE, NONE} },
+	{}
+};
+static struct serdes_config serdes2_cfg_tbl[] = {
+	{0x49, {SGMII_FM1_DTSEC1, SGMII_FM1_DTSEC2,
+		SGMII_FM1_DTSEC3, AURORA,
+		NONE, NONE, NONE, NONE} },
+	{0x4A, {SGMII_FM1_DTSEC1, SGMII_FM1_DTSEC2,
+		SGMII_FM1_DTSEC3, AURORA,
+		NONE, NONE, NONE, NONE} },
+	{0x6F, {SGMII_FM1_DTSEC1, SGMII_FM1_DTSEC2,
+		AURORA, AURORA,	NONE, NONE, NONE, NONE} },
+	{0x70, {SGMII_FM1_DTSEC1, SGMII_FM1_DTSEC2,
+		AURORA, AURORA,	NONE, NONE, NONE, NONE} },
+	{0x9A, {PCIE1, PCIE1,
+		SGMII_FM1_DTSEC3, SGMII_FM1_DTSEC4,
+		NONE, NONE, NONE, NONE} },
+	{0x9E, {PCIE1, PCIE1, PCIE1, PCIE1,
+		NONE, NONE, NONE, NONE} },
+	{}
+};
+#endif
+
 static struct serdes_config *serdes_cfg_tbl[] = {
 	serdes1_cfg_tbl,
 	serdes2_cfg_tbl,