Turn off light ubershader generation on Broadcom GPUs.

Attempt at working around #16824

GPU/Vulkan/GPU_Vulkan.cpp

@@ -287,6 +287,12 @@ u32 GPU_Vulkan::CheckGPUFeatures() const {
 	features &= ~GPU_USE_FRAMEBUFFER_FETCH;
 	// }
 
+	// Check for Broadcom, disable ubershader. Should probably include a driver version check too...
+	// Attempt at fixing issue #16824
+	if (draw_->GetDeviceCaps().vendor == Draw::GPUVendor::VENDOR_BROADCOM) {
+		features &= ~GPU_USE_LIGHT_UBERSHADER;
+	}
+
 	return CheckGPUFeaturesLate(features);
 }