usb: Add Cadence USB3 host and gadget driver

Add support for USB3 host and gadget driver. This is a direct sync of
Linux kernel Cadence USB stack that from v5.4-rc1 release.
Driver has been modified so that it compiles without errors against
U-Boot code base.
Features not required for U-Boot such as scatter-gather DMA and OTG
interrupt handling has been dropped.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
[jjhiblot@ti.com: Add PHY support]
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
diff --git a/Makefile b/Makefile
index a94b538..5c8c4c9 100644
--- a/Makefile
+++ b/Makefile
@@ -732,6 +732,7 @@
 libs-$(CONFIG_SYS_FSL_MMDC) += drivers/ddr/fsl/
 libs-$(CONFIG_$(SPL_)ALTERA_SDRAM) += drivers/ddr/altera/
 libs-y += drivers/serial/
+libs-y += drivers/usb/cdns3/
 libs-y += drivers/usb/dwc3/
 libs-y += drivers/usb/common/
 libs-y += drivers/usb/emul/