[media] smiapp-pll: Don't complain aloud about failing PLL calculation

Don't complain about a failure to compute the pre_pll divisor. The
function is used to determine whether a particular combination of bits per
sample value and a link frequency can be used, in which case there are
lots of unnecessary driver messages. During normal operation the failure
generally does not happen. Use dev_dbg() instead.

Signed-off-by: Sakari Ailus <[e-mail]>
Reviewed-by: Sebastian Reichel <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/i2c/smiapp-pll.c

···
 		return 0;
 	}
 
-	dev_info(dev, "unable to compute pre_pll divisor\n");
+	dev_dbg(dev, "unable to compute pre_pll divisor\n");
+
 	return rval;
 }
 EXPORT_SYMBOL_GPL(smiapp_pll_calculate);