ddr: marvell: a38x: add support for twin-die combined memory device

commit 6285efb8a118940877522c4c07bd7c64569b4f5f upstream.

the twin-die combined memory device should be treatened as X8
device and not as X16 one

Signed-off-by: Moti Buskila <motib@marvell.com>
Reviewed-by: Kostya Porotchkin <kostap@marvell.com>
[ - the default value for twin_die_combined is set to NOT_COMBINED for
    all boards, as this was default behaviour prior this change ]
Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
diff --git a/board/alliedtelesis/x530/x530.c b/board/alliedtelesis/x530/x530.c
index d602092..7bcfa82 100644
--- a/board/alliedtelesis/x530/x530.c
+++ b/board/alliedtelesis/x530/x530.c
@@ -68,6 +68,7 @@
 	    MV_DDR_TIM_2T} },		/* timing */
 	BUS_MASK_32BIT_ECC,		/* subphys mask */
 	MV_DDR_CFG_DEFAULT,		/* ddr configuration data source */
+	NOT_COMBINED,			/* ddr twin-die combined */
 	{ {0} },			/* raw spd data */
 	{0},				/* timing parameters */
 	{ {0} },			/* electrical configuration */