Move the parameter selection code into the Debayer base class in-order to facilitate reuse of the lookup tables in the eGL shaders. Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Milan Zamazal <mzamazal@redhat.com> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>