MIPS32: Improve string and class loads

Tested:
- MIPS32 Android boots in QEMU
- test-art-host-gtest
- test-art-target-run-test-optimizing in QEMU, on CI20
- test-art-target-gtest on CI20

Change-Id: I70fd5d5267f8594c3b29d5a4ccf66b8ca8b09df3
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index aedfcb4..d5b0d77 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -504,7 +504,7 @@
       mips::PcRelativeFixups* pc_relative_fixups =
           new (arena) mips::PcRelativeFixups(graph, codegen, stats);
       mips::DexCacheArrayFixups* dex_cache_array_fixups =
-          new (arena) mips::DexCacheArrayFixups(graph, stats);
+          new (arena) mips::DexCacheArrayFixups(graph, codegen, stats);
       HOptimization* mips_optimizations[] = {
           pc_relative_fixups,
           dex_cache_array_fixups