Staging: i4l: Do not initialise statics to 0.

Do not initialise statics to 0. Static variable by default initialise to 0,
so no need to explicit initialisation. This issue was found by checkpatch.

Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>