Most of this originates from Michael Krufky <mkrufky@linuxtv.org>;
these changes move LED control into separate functions.  This is the
first step in new work to make LED control a device-specific attribute.
Signed-off-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>