Vulkan/Texture: Add UpdateFromBuffer method

src/common/vulkan/texture.h

@@ -54,6 +54,9 @@ public:
 
   VkFramebuffer CreateFramebuffer(VkRenderPass render_pass);
 
+  void UpdateFromBuffer(VkCommandBuffer cmdbuf, u32 level, u32 layer, u32 x, u32 y, u32 width, u32 height,
+                      VkBuffer buffer, u32 buffer_offset);
+
 private:
   u32 m_width = 0;
   u32 m_height = 0;