sound: Add an ACPI driver for Dialog Semicondutor da7219

This chip is used on coral and we need to generate ACPI tables for sound
to make it work. Add a driver that does just this (i.e. at present does
not actually support playing sound).

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/sound/Kconfig b/drivers/sound/Kconfig
index 4ebc719..7f214b9 100644
--- a/drivers/sound/Kconfig
+++ b/drivers/sound/Kconfig
@@ -40,6 +40,15 @@
 	  option provides an implementation for sound_init() and
 	  sound_play().
 
+config SOUND_DA7219
+	bool "Dialog Semiconductor audio codec"
+	depends on SOUND
+	help
+	  The DA7219 is an ultra-low-power audio codec with Advanced Accessory
+	  Detection (AAD). This driver only supports generation of ACPI tables.
+	  It does not support sound output or any of the other codec
+	  features.
+
 config SOUND_I8254
 	bool "Intel i8254 timer / beeper"
 	depends on SOUND