Faster AssembleLIR for ARM.

This also reduces sizeof(LIR) by 4 bytes (32-bit builds).

Change-Id: I0cb81f9bf098dfc50050d5bc705c171af26464ce
diff --git a/compiler/dex/compiler_enums.h b/compiler/dex/compiler_enums.h
index eb4a336..964a222 100644
--- a/compiler/dex/compiler_enums.h
+++ b/compiler/dex/compiler_enums.h
@@ -417,7 +417,7 @@
 enum FixupKind {
   kFixupNone,
   kFixupLabel,       // For labels we just adjust the offset.
-  kFixupLoad,        // Mostly for imediates.
+  kFixupLoad,        // Mostly for immediates.
   kFixupVLoad,       // FP load which *may* be pc-relative.
   kFixupCBxZ,        // Cbz, Cbnz.
   kFixupPushPop,     // Not really pc relative, but changes size based on args.