mx6: Add Phytec PCM058 i.MX6 Quad

Add Phytec-i.MX6 SOM with NAND

  Support:
   - 1GB RAM
   - Ethernet
   - SPI-NOR Flash
   - NAND (1024 MB)
   - external SD
   - UART

Signed-off-by: Stefano Babic <sbabic@denx.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
8 files changed