[util] Add new flush type for render pass boundaries

src/util/util_flush.cpp

@@ -45,6 +45,7 @@ namespace dxvk {
         return chunkCount >= minChunkCount;
       }
 
+      case GpuFlushType::ImplicitMediumHint:
       case GpuFlushType::ImplicitWeakHint: {
         // Aim for a higher number of chunks per submission with
         // a weak hint in order to avoid submitting too often.

src/util/util_flush.h

@@ -18,9 +18,12 @@ namespace dxvk {
     /** GPU command that applications are likely to synchronize
      *  with soon has been recorded into the command list */
     ImplicitStrongHint      = 2,
+    /** A render pass boundary is likely to occur and a flush
+     *  should be recorded if the command list is large enough. */
+    ImplicitMediumHint      = 3,
     /** GPU commands have been recorded and a flush should be
      *  performed if the current command list is large enough. */
-    ImplicitWeakHint        = 3,
+    ImplicitWeakHint        = 4,
   };