vk_master_semaphore: Use fetch_add to increase master semaphore tick

src/video_core/renderer_vulkan/vk_master_semaphore.h

@@ -39,9 +39,9 @@ public:
         return KnownGpuTick() >= tick;
     }
 
-    /// Advance to the logical tick.
-    void NextTick() noexcept {
-        ++current_tick;
+    /// Advance to the logical tick and return the old one
+    [[nodiscard]] u64 NextTick() noexcept {
+        return current_tick.fetch_add(1, std::memory_order::relaxed);
     }
 
     /// Refresh the known GPU tick

src/video_core/renderer_vulkan/vk_scheduler.cpp

@@ -168,9 +168,7 @@ void VKScheduler::SubmitExecution(VkSemaphore semaphore) {
     EndPendingOperations();
     InvalidateState();
 
-    const u64 signal_value = master_semaphore->CurrentTick();
-    master_semaphore->NextTick();
-
+    const u64 signal_value = master_semaphore->NextTick();
     Record([semaphore, signal_value, this](vk::CommandBuffer cmdbuf) {
         cmdbuf.End();