ASoC: dmic: Add to SND_SOC_ALL_CODECS

Improve build coverage of the dmic driver.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/codecs/Kconfig

@@ -56,6 +56,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_DA7213 if I2C
 	select SND_SOC_DA732X if I2C
 	select SND_SOC_DA9055 if I2C
+	select SND_SOC_DMIC
 	select SND_SOC_BT_SCO
 	select SND_SOC_ISABELLE if I2C
 	select SND_SOC_JZ4740_CODEC