xhci-rcar: add firmware for R-Car H2/M2 USB 3.0 host controller

This patch adds a firmware for the USB 3.0 host controller of Renesas
R-Car H2 and M2 SoCs.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Kyle McMartin <kyle@kernel.org>

LICENCE.r8a779x_usb3

+Copyright (c) 2014, Renesas Electronics Corporation
+All rights reserved.
+
+Redistribution and use in binary form, without modification, are permitted
+provided that the following conditions are met:
+
+1. Redistribution in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+2. The name of Renesas Electronics Corporation may not be used to endorse or
+   promote products derived from this software without specific prior written
+   permission.
+3. Reverse engineering, decompilation, or disassembly of this software is
+   not permitted.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS ELECTRONICS CORPORATION DISCLAIMS
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND
+NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL RENESAS ELECTRONICS
+CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.

WHENCE

@@ -2482,3 +2482,11 @@ Licence:
  *	provided this copyright notice is accompanying it.
 
 --------------------------------------------------------------------------
+
+Driver: xhci-rcar -- Renesas R-Car H2/M2 USB 3.0 host controller driver
+
+File: r8a779x_usb3_v1.dlmem
+
+Licence: Redistributable. See LICENCE.r8a779x_usb3 for details.
+
+--------------------------------------------------------------------------