mx6s_capture: Add debug switch for selecting baseaddr_switch
Addresses #288 (closed)
I'm not sure how to give the debug interface a good name. I selected
struct video_device.num, but
struct device has the bridge number from device tree (?) inside.
Either way, I'm not sure how to find out which one corresponds to which sensor driver, so it's a bit of a mess. It's still useful though, as development is unlikely to progress on multiple sensors at once, so flipping them both is fine.