Add a config option to install the ql2xxx firmware binaries for QLogic
Fibre Channel adapters.
Since this doesn't quite fit under the existing categories in Config.in,
include it under a new category named "Fibre Channel Adapter Firmware".
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>