mfd: Support for user defined wm8994 irq flags

Signed-off-by: Chris Rattray <crattray@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index 893267b..f0361c0 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -141,6 +141,7 @@
 	struct wm8994_ldo_pdata ldo[WM8994_NUM_LDO];
 
 	int irq_base;  /** Base IRQ number for WM8994, required for IRQs */
+	unsigned long irq_flags; /** user irq flags */
 
         int num_drc_cfgs;
         struct wm8994_drc_cfg *drc_cfgs;