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Replace all the uses of printk() and uvc_printk() with its
equivalent dev_ alias macros.

Modify uvc_warn_once() macro to use dev_info instead printk().

They are more standard across the kernel tree and provide
more context about the error.
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>