This commit preserves all driver services, using a function based user
interface instead of the I/O interface.
The messages count parameter is now number of CAN messages instead of
number of bytes.
Some bugfixes at the same time. After this patch the drivers
may be used on RASTA systems having a big-endian PCI layout.
Removed not up to date changelogs, rely on git log instead.
The drivers are updated to use the new AMBA layer, however the
backwards-compatibility interface (ambapp_old) is used.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>