video: fbdev: matrox: convert to i2c_new_scanned_device

Move from the deprecated i2c_new_probed_device() to the new
i2c_new_scanned_device(). Make use of the new ERRPTR if suitable.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>