vk_graphics_pipeline: Add sample_count to AttachmentInfo

Controls the actual Multisample pipeline-state

src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp

@@ -154,7 +154,7 @@ bool GraphicsPipeline::Build(bool fail_on_compile_required) {
     };
 
     const vk::PipelineMultisampleStateCreateInfo multisampling = {
-        .rasterizationSamples = vk::SampleCountFlagBits::e1,
+        .rasterizationSamples = vk::SampleCountFlagBits(info.attachments.sample_count),
         .sampleShadingEnable = false,
     };
 

src/video_core/renderer_vulkan/vk_graphics_pipeline.h

@@ -123,6 +123,7 @@ struct VertexLayout {
 struct AttachmentInfo {
     VideoCore::PixelFormat color;
     VideoCore::PixelFormat depth;
+    u8 sample_count;
 };
 
 /**