ddr: marvell: a38x: Allow boards to specify CK_DELAY parameter

For some layouts it is necessary to adjust the CK_DELAY parameter to
successfully complete DDR training. Add the ability to specify the
CK_DELAY in the mv_ddr_topology_map.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
diff --git a/drivers/ddr/marvell/a38x/ddr_topology_def.h b/drivers/ddr/marvell/a38x/ddr_topology_def.h
index 950f296..34196b1 100644
--- a/drivers/ddr/marvell/a38x/ddr_topology_def.h
+++ b/drivers/ddr/marvell/a38x/ddr_topology_def.h
@@ -127,6 +127,9 @@
 
 	/* Clock enable mask */
 	u32 clk_enable;
+
+	/* Clock delay */
+	int ck_delay;
 };
 
 enum mv_ddr_iface_mode {