Add initial support for bananapi M64 board
with below features:
- U-Boot 2017.11
- Linux 4.14
- Default packages from buildroot
Cc: Jason <manager@sinovoip.com.cn>
Cc: hailymei@banana-pi.com <hailymei@banana-pi.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
