[dxvk] Be more conservative with CS data alignment

Fixes #4734. Apparently, weak alignment hints are an error rather
than getting ignored.

src/dxvk/dxvk_cs.h

@@ -159,7 +159,7 @@ namespace dxvk {
 
   private:
 
-    alignas(M)
+    alignas(std::max(alignof(T), alignof(M)))
     T               m_command;
     DxvkCsDataBlock m_data;