irda: Remove useless pm_dev references

Some IRDA headers contain references to 'struct pm_dev' that are not
necessary any more and may be removed.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>