ASoC: Intel: bytcr_rt5640: Change BYTCR default input to IN3

Out of the 11 BYTCR devices which I have access to for testing,
7 use IN3 for the internal mic and only 1 uses IN1 for the internal mic,
the other 3 use DMIC1.

So IN3 clearly is a better default, using IN3 as default avoids the need
to add DMI quirks for some of these devices.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>