V4L/DVB (8898): pvrusb2: Be able to programmatically retrieve a control's default value
The pvrusb2 control mechanism up until now has used a constant int to hold a control's default value. This change makes it possible to retrieve the control's default through some other means, e.g. as a result of a query from lower level software. Signed-off-by: NMike Isely <isely@pobox.com> Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
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