V4L/DVB (4533): Tda9887: add configuration setting for L standard PLL gating

Add a tuner config parameter for TDA9887, default_pll_gating_18, that
changes the L standard PLL gating value from 36% to 0% (datasheet says
0%, tda9887 code says 18%).
Turn this on for Microtune 4049FM5, as recomended by tuner datasheet.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/include/media/tuner-types.h b/include/media/tuner-types.h
index 3c43b95f4..37dad07 100644
--- a/include/media/tuner-types.h
+++ b/include/media/tuner-types.h
@@ -72,6 +72,9 @@
 	unsigned int port2_invert_for_secam_lc:1;
 	/* Some cards require PORT1 to be 1 for mono Radio FM and 0 for stereo. */
 	unsigned int port1_set_for_fm_mono:1;
+	/* Select 18% (or according to datasheet 0%) L standard PLL gating,
+	   vs the driver default of 36%. */
+	unsigned int default_pll_gating_18:1;
 	/* Default tda9887 TOP value in dB for the low band. Default is 0.
 	   Range: -16:+15 */
 	signed int default_top_low:5;