V4L/DVB (7943): tuner: add macro, hybrid_tuner_report_instance_count
Create a macro to report the number of instances of the tuner driver currently in use. This will allow drivers to perform specific cleanups before destroying the last instance of a tuner. Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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