[Vulkan] Make image views cover all mips

Align texture dimensions to 1 block minimum (for uploading mips)

src/xenia/gpu/texture_info.h

@@ -318,6 +318,9 @@ struct TextureInfo {
   // Get the memory location of a mip. offset_x and offset_y are in blocks.
   static uint32_t GetMipLocation(const TextureInfo& src, uint32_t mip,
                                  uint32_t* offset_x, uint32_t* offset_y);
+  // Get the byte size of a MIP when stored linearly.
+  static uint32_t GetMipLinearSize(const TextureInfo& src, uint32_t mip);
+
   static bool GetPackedTileOffset(uint32_t width, uint32_t height,
                                   const FormatInfo* format_info,
                                   uint32_t* out_offset_x,