nvidia: Add XUSB firmware for Tegra194

Add a firmware file for the XUSB controller found on Tegra194. This is
version 60.06 of the Tegra194 XUSB firmware.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -3715,6 +3715,9 @@ Version: v50.10
 File: nvidia/tegra186/xusb.bin
 Version: v55.15
 
+File: nvidia/tegra194/xusb.bin
+Version: v60.06
+
 Licence: Redistributable. See LICENCE.nvidia for details
 
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