ASoC: rt5645: set in2_diff flag for GPD win and pocket devices

The GPD pocket has a differential signal microphone and needs in2_diff
to be set to avoid getting a very noisy signal.

Since the GPD pocket and win use the same DMI strings, they share their
platform data-definition, so enabling in2_diff on the pocket also sets
it on the GPD win. The GPD win has a normal microphone, but setting
in2_diff there does not negatively impact the sound from the microphone.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5645.c

@@ -3628,6 +3628,8 @@ static const struct rt5645_platform_data gpd_win_platform_data = {
 	.jd_mode = 3,
 	.inv_jd1_1 = true,
 	.long_name = "gpd-win-pocket-rt5645",
+	/* The GPD pocket has a diff. mic, for the win this does not matter. */
+	.in2_diff = true,
 };
 
 static const struct dmi_system_id dmi_platform_gpd_win[] = {