[GPU/WGF] Use ByteAddressBuffer in precompiled shaders

Drivers and hardware may provide more optimal paths for untyped buffers
compared to typed.

Also, ByteAddressBuffer may be bound via a root descriptor in Direct3D 12,
greatly simplifying the binding logic.

ByteAddressBuffer also doesn't have the 128 * 2^20 element count limit that
typed and structured buffers have, and doesn't require the structure stride
to be specified at resource creation time in Direct3D 11.

src/xenia/gpu/d3d12/d3d12_render_target_cache.h

@@ -180,6 +180,7 @@ class D3D12RenderTargetCache final : public RenderTargetCache {
   //  copied to a different buffer - the same range may have ROV-owned color and
   //  host float32 depth at the same time).
   ID3D12Resource* edram_buffer_ = nullptr;
+  D3D12_GPU_VIRTUAL_ADDRESS edram_buffer_gpu_address_ = 0;
   D3D12_RESOURCE_STATES edram_buffer_state_;
   EdramBufferModificationStatus edram_buffer_modification_status_ =
       EdramBufferModificationStatus::kUnmodified;