Stored a copy of the PTE in the TLB like the real hardware does.

Updated PTE.R bit on Write and Instruction fetch.
Added code to read the PTE from MEM2 if the PTE is stored there.
Refactored the two hash functions to reduce code duplication.
Updated save state version.

Source/Core/Core/PowerPC/PowerPC.cpp

@@ -129,7 +129,7 @@ void Init(int cpu_core)
 			{
 				ppcState.tlb[tlb][set][way].flags = TLB_FLAG_INVALID;
 				ppcState.tlb[tlb][set][way].paddr = 0;
-				ppcState.tlb[tlb][set][way].pteg = 0;
+				ppcState.tlb[tlb][set][way].pte = 0;
 				ppcState.tlb[tlb][set][way].tag = 0;
 			}
 		}