media: ar0521: Refuse unsupported controls
Refuse unsupported controls by returning -EINVAL in the s_ctrl operation. While at it, remove a the default switch case in the first switch as it effectively is now a no-op. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
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