VulkanDevice: Avoid defaulting to Vulkan for V3D driver

Image copies are broken.

https://discord.com/channels/695640472202379425/695823554712698962/1392128815689629707

src/util/vulkan_device.cpp

@@ -1973,6 +1973,13 @@ bool VulkanDevice::IsSuitableDefaultRenderer()
     return false;
   }
 
+  // V3D is buggy, image copies with larger textures are broken.
+  if (StringUtil::StartsWithNoCase(name, "V3D"))
+  {
+    INFO_LOG("Not using Vulkan for V3D GPU.");
+    return false;
+  }
+
   INFO_LOG("Allowing Vulkan as default renderer.");
   return true;
 #endif