* [barefoot][platform] Update BFN platforms (#5356)
1. Added support of BFN newport new platform name.
2. Updated debian version for montara and mavericks platforms.
- Updated buffers config;
- Set eth2 as CPU port;
- Added systemd service file to load bf_fpga.ko
Signed-off-by: Andriy Kokhan <akokhan@barefootnetworks.com>
