net: keystone_serdes: add keystone K2E SoC support

Keystone2 Edison SoC uses the same keystone SerDes driver.
This patch adds support for K2E SoCs.

Acked-by: Vitaly Andrianov <vitalya@ti.com>
Acked-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
diff --git a/drivers/net/keystone_net.c b/drivers/net/keystone_net.c
index 13a1778..43c263e 100644
--- a/drivers/net/keystone_net.c
+++ b/drivers/net/keystone_net.c
@@ -551,6 +551,12 @@
 			&ks2_serdes_sgmii_156p25mhz,
 			CONFIG_KSNET_SERDES_LANES_PER_SGMII);
 
+#ifdef CONFIG_SOC_K2E
+	ks2_serdes_init(CONFIG_KSNET_SERDES_SGMII2_BASE,
+			&ks2_serdes_sgmii_156p25mhz,
+			CONFIG_KSNET_SERDES_LANES_PER_SGMII);
+#endif
+
 	/* wait till setup */
 	udelay(5000);
 }