ALSA: Separate common pxa2xx-ac97 code

ASoC and non-ASoC drivers for ACLINK on PXA share lot's of common code.
Move all common code into separate module snd-pxa2xx-lib.

[Fixed handing of SND_AC97_CODEC in Kconfig and some checkpatch warnings
 -- broonie]

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/arm/Makefile b/sound/arm/Makefile
index 4ef6dd0..bb2ed88 100644
--- a/sound/arm/Makefile
+++ b/sound/arm/Makefile
@@ -11,5 +11,8 @@
 obj-$(CONFIG_SND_PXA2XX_PCM)	+= snd-pxa2xx-pcm.o
 snd-pxa2xx-pcm-objs		:= pxa2xx-pcm.o
 
+obj-$(CONFIG_SND_PXA2XX_LIB)	+= snd-pxa2xx-lib.o
+snd-pxa2xx-lib-objs		:= pxa2xx-ac97-lib.o
+
 obj-$(CONFIG_SND_PXA2XX_AC97)	+= snd-pxa2xx-ac97.o
 snd-pxa2xx-ac97-objs		:= pxa2xx-ac97.o