ASoC: meson: axg: extract sound card utils

This prepares the addition of the GX SoC family sound card driver.
The GX sound card, while slightly different, will be similar to the
AXG one. The purpose of this change is to share the utils common to
both sound card driver.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200213155159.3235792-8-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/meson/Kconfig

@@ -59,6 +59,7 @@ config SND_MESON_AXG_TDMOUT
 config SND_MESON_AXG_SOUND_CARD
 	tristate "Amlogic AXG Sound Card Support"
 	select SND_MESON_AXG_TDM_INTERFACE
+	select SND_MESON_CARD_UTILS
 	imply SND_MESON_AXG_FRDDR
 	imply SND_MESON_AXG_TODDR
 	imply SND_MESON_AXG_TDMIN
@@ -94,6 +95,9 @@ config SND_MESON_AXG_PDM
 	  Select Y or M to add support for PDM input embedded
 	  in the Amlogic AXG SoC family
 
+config SND_MESON_CARD_UTILS
+       tristate
+
 config SND_MESON_CODEC_GLUE
 	tristate
 

sound/soc/meson/Makefile

@@ -19,6 +19,7 @@ snd-soc-meson-axg-sound-card-objs := axg-card.o
 snd-soc-meson-axg-spdifin-objs := axg-spdifin.o
 snd-soc-meson-axg-spdifout-objs := axg-spdifout.o
 snd-soc-meson-axg-pdm-objs := axg-pdm.o
+snd-soc-meson-card-utils-objs := meson-card-utils.o
 snd-soc-meson-codec-glue-objs := meson-codec-glue.o
 snd-soc-meson-g12a-tohdmitx-objs := g12a-tohdmitx.o
 
@@ -34,5 +35,6 @@ obj-$(CONFIG_SND_MESON_AXG_SOUND_CARD) += snd-soc-meson-axg-sound-card.o
 obj-$(CONFIG_SND_MESON_AXG_SPDIFIN) += snd-soc-meson-axg-spdifin.o
 obj-$(CONFIG_SND_MESON_AXG_SPDIFOUT) += snd-soc-meson-axg-spdifout.o
 obj-$(CONFIG_SND_MESON_AXG_PDM) += snd-soc-meson-axg-pdm.o
+obj-$(CONFIG_SND_MESON_CARD_UTILS) += snd-soc-meson-card-utils.o
 obj-$(CONFIG_SND_MESON_CODEC_GLUE) += snd-soc-meson-codec-glue.o
 obj-$(CONFIG_SND_MESON_G12A_TOHDMITX) += snd-soc-meson-g12a-tohdmitx.o