uboot-imx

MLK-18151-2 mx7dsabresd: Update codes to align with v2018.03

1. Add plugin support
2. Update to latest ddr3 script v2.0 version
   refer commit (b4db09bc0fc96e7c7461afade6346e0700ad582f)
3. Add ddr3 script for TO1.1
5. Update header file for NAND boot settings.
6. Remove the wdog WCR bit 4 clear. Since we have implemented reset_cpu for mx7d.

Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 16e51b5b59700a49c48cdfd8b308aa8793eeb44a)