ipa: rpi: awb: Disable CT search bias for Grey World AWB If grey world AWB is setup in the tuning file, the CT curve will either be missing or invalid. Disable biasing the statistics for the search in such cases. Fixes: ea8fd63d936f ("ipa: rpi: awb: Add a bias to the AWB search") Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>