shader: add GLC/DLC buffer cache policy support

Co-authored-by: Mac <me@itsmemac.com>

src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.h

@@ -712,6 +712,7 @@ struct Instruction {
 	bool           formatted                                    = false;
 	bool           gds                                          = false;
 	bool           glc                                          = false;
+	bool           dlc                                          = false;
 	bool           slc                                          = false;
 	bool           idxen                                        = false;
 	bool           offen                                        = false;