mfd: Remove references already defineid in header file from twl-core

The twl-core exported functions are already declared in twl-core.h

Include the header file instead or re-declaring the functions.
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/twl-core.c

@@ -45,6 +45,8 @@
 #include <linux/i2c.h>
 #include <linux/i2c/twl.h>
 
+#include "twl-core.h"
+
 /*
  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  * Management and System Companion Device" chips originally designed for
@@ -1154,11 +1156,6 @@ static void clocks_init(struct device *dev,
 
 /*----------------------------------------------------------------------*/
 
-int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
-int twl4030_exit_irq(void);
-int twl4030_init_chip_irq(const char *chip);
-int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
-int twl6030_exit_irq(void);
 
 static int twl_remove(struct i2c_client *client)
 {