media: ccs-pll: Print a debug message on too high VT PLL OP clock

In general the CCS PLL calculator prints debugging information on the
process to ease debugging. This case was not annotated, do that now.

Remove an extra multiplication while at it.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>