V4L/DVB (5032): Improves some USBVision info messages

Replaces the info statements with printk(KERN_INFO statements.
This will cut down on the useless information which is showing up
 in the kernel messages log file.

Signed-off-by: Dwaine P. Garden <DwaineGarden@rogers.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>