s5k5ccgx: adjust logic

-These modification were made based on the assuption that this
driver is capable of capturing jpeg images but I'm starting
to think that it can't.

-Currently captures large, seemingly blank, images. However, a
look at the image data shows that there is a lot of varying
data in there. It seems that what we get in the end is, YUVU image
data with jpeg exif data slapped in.