Create a dedicated config symbol for video device initialization.
Generally, video device init is low priority comparing to standard
devices. Moreover some video device can rely on other device init,
like the csi mcux driver which rely on sensor and i2c init.
This fixes a crash in video capture sample, when camera sensor
(mt9m114) is not connected.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
This is a virtual device generating video pattern for testing
purpose. It supports colobar pattern for now.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
