TextureCache: Support compressed textures and pass pitch/size to upload

This also removes an extra copy of the image for custom textures.

Source/Core/VideoBackends/D3D/TextureCache.cpp

@@ -129,10 +129,10 @@ void TextureCache::TCacheEntry::CopyRectangleFromTexture(const TCacheEntryBase*
   g_renderer->RestoreAPIState();
 }
 
-void TextureCache::TCacheEntry::Load(const u8* buffer, u32 width, u32 height, u32 expanded_width,
-                                     u32 level)
+void TextureCache::TCacheEntry::Load(u32 level, u32 width, u32 height, u32 row_length,
+                                     const u8* buffer, size_t buffer_size)
 {
-  unsigned int src_pitch = 4 * expanded_width;
+  u32 src_pitch = row_length * 4;
   D3D::context->UpdateSubresource(texture->GetTex(), level, nullptr, buffer, src_pitch, 0);
 }