arm, davinci: add cam_enc_4xx support

arm, davinci: add cam_enc_4xx support

- DM368 SOC
- booting with spl not with UBL from TI
- before loading u-boot from NAND into RAM, test
  the RAM with the post memory test. If error
  is found, switch all LEDs on and halt system.
- SPI Flash
  Dataflash Typ: M25PE80
- Ethernet DM9161BI
- MMC
- USB

Signed-off-by: Heiko Schocher <[email protected]>
Cc: Sandeep Paulraj <[email protected]>
Cc: Albert ARIBAUD <[email protected]>
Cc: Igor Grinberg <[email protected]>
Signed-off-by: Sandeep Paulraj <[email protected]>