usb: host: xhci-plat: add support for the R-Car H3 xHCI controllers

This patch adds a firmware for the USB 3.0 host controllers of Renesas
R-Car H3 SoC.
This firmware is possible to use on R-Car H2 and M2. However, this
version causes performance degradation on R-Car H2 and M2. So, we would
like to keep the v1 firmware.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Kyle McMartin <kyle@kernel.org>

WHENCE

@@ -2749,9 +2749,10 @@ Licence:
 
 --------------------------------------------------------------------------
 
-Driver: xhci-rcar -- Renesas R-Car H2/M2 USB 3.0 host controller driver
+Driver: xhci-rcar -- Renesas R-Car H2/M2/H3 USB 3.0 host controller driver
 
 File: r8a779x_usb3_v1.dlmem
+File: r8a779x_usb3_v2.dlmem
 
 Licence: Redistributable. See LICENCE.r8a779x_usb3 for details.