board: k2e-evm: add board support

This patch adds Keystone2 k2e_evm evaluation board support.

Signed-off-by: Hao Zhang <hzhang@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
diff --git a/board/ti/ks2_evm/ddr3_cfg.h b/board/ti/ks2_evm/ddr3_cfg.h
index d14bac3..15fcf52 100644
--- a/board/ti/ks2_evm/ddr3_cfg.h
+++ b/board/ti/ks2_evm/ddr3_cfg.h
@@ -16,6 +16,9 @@
 extern struct ddr3_phy_config ddr3phy_1333_2g;
 extern struct ddr3_emif_config ddr3_1333_2g;
 
+extern struct ddr3_phy_config ddr3phy_1600_4g;
+extern struct ddr3_emif_config ddr3_1600_4g;
+
 int ddr3_get_dimm_params(char *dimm_name);
 
 #endif /* __DDR3_CFG_H */