ARM: da8xxevm: Add NAND instructions for da850-evm to README

The README.da850 file continues information on how to burn NAND
for the LCDK, but not the DA850-EVM.  This patch adds both the
commands and dip switch instructions for burning and booting
NAND.

Signed-off-by: Adam Ford <aford173@gmail.com>
1 file changed