usb: gadget: atmel: Add DM_USB_GADGET support

Add driver model support by using the uclass UCLASS_USB_GADGET_GENERIC.

Disable local usb_gadget_register_driver()/usb_gadget_unregister_driver()
implementation which is implemented in udc-core.c when DM_USB_GADGET
is enabled.

Replace dm_usb_gadget_handle_interrupts() with handle_interrupts ops
when DM_USB_GADGET is enabled.

Disable legacy struct usba_udc controller as controller point is extracted
from udevice private data with DM.

Disable legacy usba_udc_probe() to avoid conflict with DM when it's
enabled.

Compared to Linux driver only supported devices' DT bindings are included
(sorted as Linux driver)

Signed-off-by: Zixun LI <admin@hifiphile.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20240725153204.358925-8-admin@hifiphile.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
diff --git a/drivers/usb/gadget/atmel_usba_udc.h b/drivers/usb/gadget/atmel_usba_udc.h
index f6cb48c..7f5e98f 100644
--- a/drivers/usb/gadget/atmel_usba_udc.h
+++ b/drivers/usb/gadget/atmel_usba_udc.h
@@ -211,6 +211,9 @@
 #define EP0_EPT_SIZE		USBA_EPT_SIZE_64
 #define EP0_NR_BANKS		1
 
+#define FIFO_IOMEM_ID	0
+#define CTRL_IOMEM_ID	1
+
 #define DBG_ERR		0x0001	/* report all error returns */
 #define DBG_HW		0x0002	/* debug hardware initialization */
 #define DBG_GADGET	0x0004	/* calls to/from gadget driver */