km/scripts: fix run ramfs and COGE5 tftppath problem

The tftppath was not set in case of run ramfs. It worked only by chance
if was already set before.

Also check the boardname before setting the tftppath for COGE5.

Signed-off-by: Holger Brunck <holger.brunck@ch.abb.com>
CC: Tom Rini <trini@konsulko.com>
2 files changed