[texture_cache] Fix WIN32 #ifdef for texture_cache (#2823)

The #ifdef introduced in #2720 was wrong

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2823
Co-authored-by: unknown <sahyno1996@gmail.com>
Co-committed-by: unknown <sahyno1996@gmail.com>

src/video_core/renderer_vulkan/vk_texture_cache.cpp

@@ -1377,7 +1377,9 @@ void TextureCacheRuntime::CopyImage(Image& dst, Image& src,
     // As per the size-compatible formats section of vulkan, copy manually via ReinterpretImage
     // these images that aren't size-compatible
     if (BytesPerBlock(src.info.format) != BytesPerBlock(dst.info.format)) {
-#ifdef __WIN32__
+#ifdef _WIN32
+        // On Windows, linear images cause device loss when used in image copies.
+        // Tested with TitleID: 0x010067300059A00 (Mario + Rabbids Kingdom Battle)
         if (src.info.type == ImageType::Linear || dst.info.type == ImageType::Linear) {
             return;
         }