video_core; Get rid of global g_toggle_framelimit_enabled variable

Instead, we make a struct for renderer settings and allow the renderer
to update all of these settings, getting rid of the need for
global-scoped variables.

This also uncovered a few indirect inclusions for certain headers, which
this commit also fixes.

src/video_core/gpu.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/assert.h"
 #include "video_core/engines/fermi_2d.h"
 #include "video_core/engines/maxwell_3d.h"
 #include "video_core/engines/maxwell_compute.h"
@@ -11,6 +12,15 @@
 
 namespace Tegra {
 
+u32 FramebufferConfig::BytesPerPixel(PixelFormat format) {
+    switch (format) {
+    case PixelFormat::ABGR8:
+        return 4;
+    }
+
+    UNREACHABLE();
+}
+
 GPU::GPU(VideoCore::RasterizerInterface& rasterizer) {
     memory_manager = std::make_unique<MemoryManager>();
     maxwell_3d = std::make_unique<Engines::Maxwell3D>(rasterizer, *memory_manager);