mfd: Fix arizona-irq.c build by selecting REGMAP_IRQ

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@xenotime.net>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 12c693b9c2fe..ff3b77dabf77 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -523,6 +523,7 @@ config MFD_SEC_CORE
 
 config MFD_ARIZONA
         select REGMAP
+        select REGMAP_IRQ
         bool
 
 config MFD_ARIZONA_I2C