Cleanup ARM load/store wide and remove unused param s_reg.

Use a single LDRD/VLDR instruction for wide load/store on
ARM, adjust the base pointer if needed. Remove unused
parameter s_reg from LoadBaseDisp(), LoadBaseIndexedDisp()
and StoreBaseIndexedDisp() on all architectures.

Change-Id: I25a9a42d523a68addbc11abe44ddc55a4401df98
diff --git a/compiler/dex/quick/gen_loadstore.cc b/compiler/dex/quick/gen_loadstore.cc
index 6fe1e31..fc6af29 100644
--- a/compiler/dex/quick/gen_loadstore.cc
+++ b/compiler/dex/quick/gen_loadstore.cc
@@ -123,7 +123,7 @@
   } else {
     DCHECK((rl_src.location == kLocDalvikFrame) ||
            (rl_src.location == kLocCompilerTemp));
-    LoadBaseDisp(TargetReg(kSp), SRegOffset(rl_src.s_reg_low), r_dest, k64, INVALID_SREG);
+    LoadBaseDisp(TargetReg(kSp), SRegOffset(rl_src.s_reg_low), r_dest, k64);
   }
 }