pwm: Move TWL6030 PWM driver to PWM framework

This commit moves the driver to drivers/pwm and converts it to the new
PWM framework. In order for this to work properly, register the PWM as
child of the multi-function TWL6030 device.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index e208d88..3d70012 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -670,6 +670,13 @@
 			return PTR_ERR(child);
 	}
 
+	if (IS_ENABLED(CONFIG_PWM_TWL6030) && twl_class_is_6030()) {
+		child = add_child(TWL6030_MODULE_ID1, "twl6030-pwm", NULL, 0,
+				  false, 0, 0);
+		if (IS_ERR(child))
+			return PTR_ERR(child);
+	}
+
 	if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
 	    twl_class_is_4030()) {