video_core: gpu: Refactor out synchronous/asynchronous GPU implementations.

- We must always use a GPU thread now, even with synchronous GPU.

src/video_core/framebuffer_config.h

@@ -0,0 +1,31 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Tegra {
+
+/**
+ * Struct describing framebuffer configuration
+ */
+struct FramebufferConfig {
+    enum class PixelFormat : u32 {
+        A8B8G8R8_UNORM = 1,
+        RGB565_UNORM = 4,
+        B8G8R8A8_UNORM = 5,
+    };
+
+    VAddr address{};
+    u32 offset{};
+    u32 width{};
+    u32 height{};
+    u32 stride{};
+    PixelFormat pixel_format{};
+
+    using TransformFlags = Service::NVFlinger::BufferQueue::BufferTransformFlags;
+    TransformFlags transform_flags{};
+    Common::Rectangle<int> crop_rect;
+};
+
+} // namespace Tegra