ASoC: Add SDCA IRQ support and some misc fixups

Merge series from Charles Keepax <ckeepax@opensource.cirrus.com>:

Add a maintainers entry for SDCA, do a couple of small fixups for
previous chains, and then adding the beginnings of the SDCA IRQ
handling. This is based around a regmap IRQ chip and a few helper
functions that can be called from the client drivers to setup the
IRQs.

diff --cc MAINTAINERS
Simple merge

diff --cc sound/soc/sdca/Kconfig
index 1c95dce04145441c2284c84a3c8f386754054d6f,a633d5a0fea519129fb725e87b985bb2027eb3df..53f6926255ae3f3b60ef413e13100e32d9d2fe43
--- 1/sound/soc/sdca/Kconfig
--- 2/sound/soc/sdca/Kconfig
+++ b/sound/soc/sdca/Kconfig
@@@ -15,4 -14,9 +15,11 @@@ config SND_SOC_SDCA_HI
        tristate "SDCA HID support"
        depends on SND_SOC_SDCA && HID
  
+ config SND_SOC_SDCA_IRQ
+       tristate
+       select REGMAP
+       select REGMAP_IRQ
+       help
+         This option enables support for SDCA IRQs.
++
 +endmenu