[PATCH -next] mfd: fix arizona-irq.c build by selecting REGMAP_IRQ

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxx>

arizona-irq.c uses functions that are only available when
CONFIG_REGMAP_IRQ is enabled, so select that symbol for
arizona builds.

Fixes these build errors:

arizona-irq.c:(.text+0xb2d47): undefined reference to `regmap_irq_get_virq'
(.text+0xb2fe3): undefined reference to `regmap_add_irq_chip'
(.text+0xb3173): undefined reference to `regmap_del_irq_chip'

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
Cc: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
 drivers/mfd/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20120723.orig/drivers/mfd/Kconfig
+++ linux-next-20120723/drivers/mfd/Kconfig
@@ -523,6 +523,7 @@ config MFD_SEC_CORE
 
 config MFD_ARIZONA
 	select REGMAP
+	select REGMAP_IRQ
 	bool
 
 config MFD_ARIZONA_I2C
--
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