GP-3845 Fixed creation of undefined data type for PPC read/write

references

Ghidra/Processors/PowerPC/src/main/java/ghidra/app/plugin/core/analysis/PowerPCAddressAnalyzer.java

@@ -256,11 +256,6 @@ public class PowerPCAddressAnalyzer extends ConstantPropagationAnalyzer {
 						}
 					}
 
-					// markup the data flow for this instruction
-					if (refType.isData()) {
-						return true;
-					}
-
 					return super.evaluateReference(context, instr, pcodeop, address, size, dataType, refType);
 				}