staging: vt6656: Remove unnecessary local variable initialization

Don't initialize the rate variable as it is set a few lines later.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Oscar Carter <oscar.carter@gmx.com>
Link: https://lore.kernel.org/r/20200407163915.7491-3-oscar.carter@gmx.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>