ARM: mvebu: a38x: restore support for setting timing

This restores support for configuring the timing mode based on the
ddr_topology. This was originally implemented in commit 90bcc3d38d
("driver/ddr: Add support for setting timing in hws_topology_map") but
was removed as part of the upstream sync.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>

drivers/ddr/marvell/a38x/ddr_topology_def.h

@@ -64,6 +64,9 @@ struct if_params {
 
 	/* operation temperature */
 	enum mv_ddr_temperature interface_temp;
+
+	/* 2T vs 1T mode (by default computed from number of CSs) */
+	enum mv_ddr_timing timing;
 };
 
 struct mv_ddr_topology_map {