ASoC: hisilicon: Add hi6210 i2s audio driver

Add driver for hi6210 i2s controller found on hi6220 boards.

Signed-off-by: Andy Green <andy.green@linaro.org>
[jstultz: Forward ported to mainline, fairly major rework
 based on suggestions from Mark Brown]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 9a30f21..2f6aabb 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -27,6 +27,7 @@
 obj-$(CONFIG_SND_SOC)	+= davinci/
 obj-$(CONFIG_SND_SOC)	+= dwc/
 obj-$(CONFIG_SND_SOC)	+= fsl/
+obj-$(CONFIG_SND_SOC)	+= hisilicon/
 obj-$(CONFIG_SND_SOC)	+= jz4740/
 obj-$(CONFIG_SND_SOC)	+= img/
 obj-$(CONFIG_SND_SOC)	+= intel/