ART: Make some helpers non-virtual in Mir2Lir

These don't need to be virtual.

Change-Id: Idca3c0a4e8b5e045d354974bd993492d6c0e70ba
diff --git a/compiler/dex/quick/gen_invoke.cc b/compiler/dex/quick/gen_invoke.cc
index 73629e8..2a6dfef 100755
--- a/compiler/dex/quick/gen_invoke.cc
+++ b/compiler/dex/quick/gen_invoke.cc
@@ -918,8 +918,8 @@
 
   RegStorage reg_slow_path = AllocTemp();
   RegStorage reg_disabled = AllocTemp();
-  Load8Disp(reg_class, slow_path_flag_offset, reg_slow_path);
-  Load8Disp(reg_class, disable_flag_offset, reg_disabled);
+  LoadBaseDisp(reg_class, slow_path_flag_offset, reg_slow_path, kSignedByte, kNotVolatile);
+  LoadBaseDisp(reg_class, disable_flag_offset, reg_disabled, kSignedByte, kNotVolatile);
   FreeTemp(reg_class);
   LIR* or_inst = OpRegRegReg(kOpOr, reg_slow_path, reg_slow_path, reg_disabled);
   FreeTemp(reg_disabled);