mx6sabre{auto,sd}: Change FDT loading address to avoid overlaping

The new FSL 3.10.9_1.0.0-alpha kernel requires more memory space and
with the previous loading address we had ovelap; change it for the
same address used in 2013.04-3.10.9_1.0.0-alpha U-Boot.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>