Add Altera USB-Blaster SPI programmer

Adds support for the Altera USB-Blaster programming dongle in Active
Serial (AS) mode. Tested on both original product and a clone dongle.

Corresponding to flashrom svn r1658.

Signed-off-by: James Laird <jhl@mafipulation.org>
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
6 files changed