usb: modify usb_gadget_handle_interrupts to take controller index

Since we support multiple dwc3 controllers to be existent at the same
time, in order to handle the interrupts of a particular dwc3 controller
usb_gadget_handle_interrutps should take controller index as an
argument.

Hence the API of usb_gadget_handle_interrupts is modified to take
controller index as an argument and made the corresponding changes to all
the usb_gadget_handle_interrupts calls.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
diff --git a/drivers/usb/gadget/fotg210.c b/drivers/usb/gadget/fotg210.c
index 3acf6a1..1d8f58f 100644
--- a/drivers/usb/gadget/fotg210.c
+++ b/drivers/usb/gadget/fotg210.c
@@ -832,7 +832,7 @@
 	},
 };
 
-int usb_gadget_handle_interrupts(void)
+int usb_gadget_handle_interrupts(int index)
 {
 	struct fotg210_chip *chip = &controller;
 	struct fotg210_regs *regs = chip->regs;