arch-arm,cpu: Use getEMI() in more places.

Use that method to avoid reading the machInst.

Change-Id: I11434206c0b7a1aa3793aa46b5056ad60a64b01c
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/40100
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

src/cpu/minor/dyn_inst.cc

@@ -214,7 +214,7 @@ MinorDynInst::minorTraceInst(const Named &named_object) const
                     regs_str << ',';
             }
 
-            ccprintf(regs_str, " extMachInst=%160x", staticInst->machInst);
+            ccprintf(regs_str, " extMachInst=%160x", staticInst->getEMI());
         }
 
         std::ostringstream flags;