Blackfin: pr1: new board port

This add support for the PR1 Appliance - Asterisk based ISDN PRI PBX.
This board is Blackfin BF537 based.  The schematics are not fully opened.

Signed-off-by: Dimitar Penev <dpn@switchfin.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
6 files changed