inorder-tlb-cunit: merge the TLB as implicit to any memory access

TLBUnit no longer used and we also get rid of memAccSize and memAccFlags functions added to ISA and StaticInst
since TLB is not a separate resource to acquire. Instead, TLB access is done before any read/write to memory
and the result is checked before it's sent out to memory.
* * *

src/cpu/SConscript

@@ -56,8 +56,6 @@ virtual Fault initiateAcc(%(type)s *xc, Trace::InstRecord *traceData) const
 virtual Fault completeAcc(Packet *pkt, %(type)s *xc,
                           Trace::InstRecord *traceData) const
 { panic("completeAcc not defined!"); M5_DUMMY_RETURN };
-virtual int memAccSize(%(type)s *xc)
-{ panic("memAccSize not defined!"); M5_DUMMY_RETURN };
 '''
 
 mem_ini_sig_template = '''