Quick compiler: fix DCHECKS

The recent change to introduce k32, k64 and kReference operand
sizes missed updating a few DCHECKS.

Change-Id: I66eb617b07766e781b38962dc862fc5b023c2fbd
diff --git a/compiler/dex/quick/mips/utility_mips.cc b/compiler/dex/quick/mips/utility_mips.cc
index 12775e1..a865430 100644
--- a/compiler/dex/quick/mips/utility_mips.cc
+++ b/compiler/dex/quick/mips/utility_mips.cc
@@ -357,7 +357,7 @@
 
   if (MIPS_FPREG(r_dest.GetReg())) {
     DCHECK(MIPS_SINGLEREG(r_dest.GetReg()));
-    DCHECK((size == k32) || (size == kSingle));
+    DCHECK((size == k32) || (size == kSingle) || (size == kReference));
     size = kSingle;
   } else {
     if (size == kSingle)
@@ -409,7 +409,7 @@
 
   if (MIPS_FPREG(r_src.GetReg())) {
     DCHECK(MIPS_SINGLEREG(r_src.GetReg()));
-    DCHECK((size == k32) || (size == kSingle));
+    DCHECK((size == k32) || (size == kSingle) || (size == kReference));
     size = kSingle;
   } else {
     if (size == kSingle)