Allow overlapping ranges in cellGcmMapEaIoAdress with coherency check (#3070)

According to Jarves, lle-gcm branch already does the same thing so we know the behaviour should be correct

rpcs3/Emu/Memory/Memory.cpp

@@ -59,7 +59,10 @@ bool VirtualMemoryBlock::Map(u32 realaddr, u32 size, u32 addr)
 	{
 		if (addr >= m_mapped_memory[i].addr && addr + size - 1 <= m_mapped_memory[i].addr + m_mapped_memory[i].size - 1)
 		{
-			return false;
+			// it seems mapping another range inside a previous one is legit on ps3
+			// as long as it's coherent aliasing : offset from EA must match IO offset
+			// example game using this pattern : BCES01584 - the last of us
+			return (addr - m_mapped_memory[i].addr) == (realaddr - m_mapped_memory[i].realAddress);
 		}
 	}