driver: brcm: add USB driver

Signed-off-by: Bharat Gooty <bharat.gooty@broadcom.com>
Change-Id: I456aa7a641fffa8ea4e833615af3effec42a31b2
diff --git a/plat/brcm/board/stingray/include/platform_usb.h b/plat/brcm/board/stingray/include/platform_usb.h
new file mode 100644
index 0000000..5b5309f
--- /dev/null
+++ b/plat/brcm/board/stingray/include/platform_usb.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2019 - 2021, Broadcom
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLATFORM_USB_H
+#define PLATFORM_USB_H
+
+#include <platform_def.h>
+
+#define USB3_DRD		BIT(0U)
+#define USB3H_USB2DRD		BIT(1U)
+
+extern const unsigned int xhc_portsc_reg_offset[MAX_USB_PORTS];
+
+void xhci_phy_init(void);
+
+#endif /* PLATFORM_USB_H */