uboot-phytec

pico-imx6ul: Add support for the 512MB module

Currently only the module with 256MB of RAM is supported.

Add support for the 512MB of RAM variant as well.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>