V4L/DVB (3387): clean up some comments

- clean up some comments
Signed-off-by: Michael Krufky <mkrufky@m1k.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

include/media/tuner-types.h

@@ -31,7 +31,8 @@ struct tuner_params {
 	 *   will result in very low tuning voltage which may drive the
 	 *   oscillator to extreme conditions.
 	 *
-	 * Set this flag to 1 if this tuner needs this check.
+	 * Set cb_first_if_lower_freq to 1, if this check is 
+	 * required for this tuner.
 	 *
 	 * I tested this for PAL by first setting the TV frequency to
 	 * 203 MHz and then switching to 96.6 MHz FM radio. The result was