[MIPS] IP22/28: Add platform devices for HAL2

Create platform devices for hal2 and add option for selecting HAL2 alsa
driver.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 72baa1a..d23204e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -385,6 +385,8 @@
 	select SGI_HAS_DS1286
 	select SGI_HAS_I8042
 	select SGI_HAS_INDYDOG
+	select SGI_HAS_HAL2
+	select SGI_HAS_HAL2
 	select SGI_HAS_SEEQ
 	select SGI_HAS_WD93
 	select SGI_HAS_ZILOG
@@ -868,6 +870,9 @@
 config SGI_HAS_INDYDOG
 	bool
 
+config SGI_HAS_HAL2
+	bool
+
 config SGI_HAS_SEEQ
 	bool