configs: sama5d2_ptc_ek: add default bootargs for NAND defconfig

Add the default kernel bootargs according to our NAND flash demo layout:
http://www.at91.com/linux4sam/bin/view/Linux4SAM/Sama5d2PtcEKMainPage#NAND_Flash_demo_Memory_map

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
1 file changed