ARC: Conform to C99 integer types format specifiers

Signed-off-by: Anton Kolesov <anton.kolesov@synopsys.com>
ftdi: Add configurations for Digilent HS1 and HS2

Signed-off-by: Anton Kolesov <anton.kolesov@synopsys.com>
ARC: Remove obsolete Digilent HS configuration

Part of fix for STAR 9000606651. Replacements commited in previous patch
7669e76.

Signed-off-by: Anton Kolesov <anton.kolesov@synopsys.com>
ft2232: Add Digilent HS2 support to ft2232 interface

Part of fix for STAR 9000606651.

Signed-off-by: Anton Kolesov <anton.kolesov@synopsys.com>
ARC: Switch to new ftdi configurations for all targets

Part of fix for STAR 9000606651.

Signed-off-by: Anton Kolesov <anton.kolesov@synopsys.com>
ARC: Reorganize log messages

* Convert many LOG_USER to other LOG_ calls
* Remove leftover printfs and line feeds
* Change text in some cases.

Signed-off-by: Anton Kolesov <anton.kolesov@synopsys.com>