[media] technisat-usb2: rename led enums to be specific to driver

The current names clash with include/linux/leds.h namespace,
although there is no compile issue currently this does affect
backports. Drivers should also try to avoid generic namespaces
for things like this.

Cc: Felipe Pena <felipensp@gmail.com>
Cc: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>