mfd: Rename twl4030_ routines in twl-regulator.c

This patch renames all twl4030_ functions to twl so that regulator driver
can be reused by Triton - TWL4030 and Phoenix - TWL6030.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/twl-core.c

@@ -496,7 +496,7 @@ add_regulator_linked(int num, struct regulator_init_data *pdata,
 	}
 
 	/* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
-	return add_numbered_child(3, "twl4030_reg", num,
+	return add_numbered_child(3, "twl_reg", num,
 		pdata, sizeof(*pdata), false, 0, 0);
 }