ASoC: Intel: byt-rt5640: Update internal mic and speaker kcontrol names

Use more sensible kcontrol names than "Int Mic" and "Ext Spk". Speakers
especially are usually integrated devices in sales models.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
ASoC: Intel: byt-rt5640: Use init time DAI format

Setting static DAI format has been supported in the soc-core quite some time
now so there is no need to set it runtime in machine driver.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
ASoC: Intel: sst-acpi: Fix Oops in case of missing firmware

I swear I tested missing firmware in commit e5161d7987f1 ("ASoC: Intel:
sst-acpi: Request firmware before SST platform driver probing").

Unfortunately same wasn't done in commit 6dda27cbbd1d ("ASoC: Intel:
sst-acpi: Add support for multiple machine drivers per platform") which
will cause NULL pointer dereference in sst_acpi_fw_cb() when printing the
error since sst_acpi->mach is not set.

Fix this obvious error by setting the sst_acpi->mach in sst_acpi_probe().

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>