display5: ddr: Enable support for DDR3 auto calibration

This code performs DDR3 memory calibration for display5 board.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/configs/display5_defconfig b/configs/display5_defconfig
index aaf8529..6ae6d05 100644
--- a/configs/display5_defconfig
+++ b/configs/display5_defconfig
@@ -4,6 +4,7 @@
 CONFIG_SPL_GPIO_SUPPORT=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_MX6_DDRCAL=y
 CONFIG_TARGET_DISPLAY5=y
 CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y