usb: gadget: at91_udc: add at91_udc into U-Boot

add U-Boot specific changes to the at91_udc linux driver,
so it works with U-Boot.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/include/linux/usb/at91_udc.h b/include/linux/usb/at91_udc.h
new file mode 100644
index 0000000..cd0d00f
--- /dev/null
+++ b/include/linux/usb/at91_udc.h
@@ -0,0 +1,20 @@
+/*
+ * Platform data definitions for Atmel USBA gadget driver
+ * pieces copied from linux:include/linux/platform_data/atmel.h
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+#ifndef __LINUX_USB_AT91_UDC_H__
+#define __LINUX_USB_AT91_UDC_H__
+
+struct at91_udc_data {
+	int	vbus_pin;		/* high == host powering us */
+	u8	vbus_active_low;	/* vbus polarity */
+	u8	vbus_polled;		/* Use polling, not interrupt */
+	int	pullup_pin;		/* active == D+ pulled up */
+	u8	pullup_active_low;	/* true == pullup_pin is active low */
+	unsigned long	baseaddr;
+};
+
+int at91_udc_probe(struct at91_udc_data *pdata);
+#endif /* __LINUX_USB_AT91_UDC_H__ */