board: freescale: t104xrdb: Set popts->cpo_sample to 0x54 for DDR3

Set popts->cpo_sample to 0x54 in t104xrdb/ddr.c to optimize cpo

Signed-off-by: Priyanka Singh <priyanka.singh@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

board/freescale/t104xrdb/ddr.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2013 Freescale Semiconductor, Inc.
+ * Copyright 2021 NXP
  */
 
 #include <common.h>
@@ -83,6 +84,7 @@ found:
 	/* optimize cpo for erratum A-009942 */
 	popts->cpo_sample = 0x59;
 #else
+	popts->cpo_sample = 0x54;
 	popts->half_strength_driver_enable = 0;
 #endif
 	/*