vrend: Support R16G16B16X16
vkcube-wayland doesn't work with Weston on my desktop RPL Qemu/Venus dev setup because of unsupported R16G16B16X16 FB format, adding format makes it work
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vkcube-wayland doesn't work with Weston on my desktop RPL Qemu/Venus dev setup because of unsupported R16G16B16X16 FB format, adding format makes it work