fsl/board/ddr: optimize board-specific cpo for erratum A-009942

Optimize board-specific cpo for erratum A-009942 on b4860qds,
ls1043aqds, ls1043ardb, ls1046aqds, ls1046ardb, ls2080ardb,
t102xqds, t102xrdb, t1040qds, t104xrdb, t208xqds, t208xrdb,
t4qds, t4rdb boards.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/t102xrdb/ddr.c b/board/freescale/t102xrdb/ddr.c
index edfbdbf..9e1b16b 100644
--- a/board/freescale/t102xrdb/ddr.c
+++ b/board/freescale/t102xrdb/ddr.c
@@ -139,6 +139,10 @@
 #ifdef CONFIG_T1023RDB
 	popts->wrlvl_ctl_2 = 0x07070606;
 	popts->half_strength_driver_enable = 1;
+	popts->cpo_sample = 0x43;
+#elif defined(CONFIG_T1024RDB)
+	/* optimize cpo for erratum A-009942 */
+	popts->cpo_sample = 0x52;
 #endif
 }