[media] technisat-usb2: added driver for Technisat's USB2.0 DVB-S/S2 receiver

This patch is adding support for Technisat's new USB2.0 DVB-S/S2 receiver
device. The development was sponsored by Technisat.

The Green led is toggle depending on the frontend-state. The Red LED is turned
on all the time.

The MAC address reading from the EEPROM along with the
LRC-method to check whether its valid.

Support for the IR-receiver of the Technisat USB2 box. The keys of
small, black remote-control are built-in, repeated key behaviour are
simulated.

The i2c-mutex of the dvb-usb-structure is used as a general mutex for
USB requests, as there are 3 threads racing for atomic requests
consisting of multiple usb-requests.

A module option is there which disables the toggling of LEDs by the
driver on certain triggers. Useful when being used in a "dark"
environment.

[mchehab@redhat.com: Fix merge conflicts with RC renaming patches]
Signed-off-by: Martin Wilks <m.wilks@technisat.com>
Signed-off-by: Patrick Boettcher <pboettcher@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>