DaVinci DM6446: Config Update

The DM6446 does not build due to the ARM
relocation patch.

Also the board does not build in the NOR
mode. Changed default to NAND to ensure
no build failure.
While at it removed CONFIG_CMD_KGDB

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
1 file changed