USB: twl4030: Enable USB regulators before enabling USB charging

For TWL family of power management ICs, USB charging works only
when USB regulators are in enabled state: 3v1, 1v5, 1v8

On a USB cable attach, twl4030_phy_resume(twl) function enables
the regulators. Enable USB charging, only after all regulators
are enabled.

Its observed that enabling USB charging before regulators are
enabled, causes USB charging to fail.

Tested on: Zoom2: omap3430: ES3.1 + TWL5030
Needs T2-MADC and T2-BCI drivers which are still not upstreamed.

Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Leed Aguilar <leed.aguilar@ti.com>
Acked-by: Vikram Pandita <vikram.pandita@ti.com>
Acked-by: Anand Gadiyar <gadiyar@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/otg/twl4030-usb.c

@@ -598,12 +598,12 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
 		 * USB_LINK_VBUS state.  musb_hdrc won't care until it
 		 * starts to handle softconnect right.
 		 */
-		twl4030charger_usb_en(status == USB_LINK_VBUS);
-
 		if (status == USB_LINK_NONE)
 			twl4030_phy_suspend(twl, 0);
 		else
 			twl4030_phy_resume(twl);
+
+		twl4030charger_usb_en(status == USB_LINK_VBUS);
 	}
 	sysfs_notify(&twl->dev->kobj, NULL, "vbus");