vk: Improve AMD driver support

- Workaround broken fp16 in AMDVLK/RADV
- Do not disable primitive restart as the issue seems to have been fixed

rpcs3/Emu/RSX/VK/VKHelpers.cpp

@@ -309,21 +309,8 @@ namespace vk
 		switch (g_driver_vendor = g_current_renderer->gpu().get_driver_vendor())
 		{
 		case driver_vendor::AMD:
-			// Radeon proprietary driver does not properly handle fence reset and can segfault during vkResetFences
-			// Disable fence reset for proprietary driver and delete+initialize a new fence instead
-			g_drv_disable_fence_reset = true;
-			// Fall through
 		case driver_vendor::RADV:
-			// Radeon fails to properly handle degenerate primitives if primitive restart is enabled
-			// One has to choose between using degenerate primitives or primitive restart to break up lists but not both
-			// Polaris and newer will crash with ERROR_DEVICE_LOST
-			// Older GCN will work okay most of the time but also occasionally draws garbage without reason (proprietary driver only)
-			if (g_driver_vendor == driver_vendor::AMD ||
-				gpu_name.find("VEGA") != std::string::npos ||
-				gpu_name.find("POLARIS") != std::string::npos)
-			{
-				g_drv_no_primitive_restart_flag = !g_cfg.video.vk.force_primitive_restart;
-			}
+			// Previous bugs with fence reset and primitive restart seem to have been fixed with newer drivers
 			break;
 		case driver_vendor::NVIDIA:
 			// Nvidia cards are easily susceptible to NaN poisoning

rpcs3/Emu/RSX/VK/VKHelpers.h

@@ -541,6 +541,14 @@ private:
 				// See https://bugs.freedesktop.org/show_bug.cgi?id=110970
 				LOG_FATAL(RSX, "RADV drivers have a major driver bug with LLVM 8 resulting in no visual output. Upgrade to LLVM 9 version of mesa to avoid this issue.");
 			}
+
+#ifndef _WIN32
+			if (get_name().find("VEGA"))
+			{
+				LOG_WARNING(RSX, "float16_t does not work correctly on VEGA hardware for both RADV and AMDVLK. Using float32_t fallback instead.");
+				shader_types_support.allow_float16 = false;
+			}
+#endif
 		}
 
 		std::string get_name() const