Add the encoding information for the rest of the ARM mode multiply instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117133 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/MC/ARM/simple-encoding.ll b/test/MC/ARM/simple-encoding.ll
index f2c0c7c..8cf8577 100644
--- a/test/MC/ARM/simple-encoding.ll
+++ b/test/MC/ARM/simple-encoding.ll
@@ -3,7 +3,9 @@
 
 ;FIXME: Once the ARM integrated assembler is up and going, these sorts of tests
 ;       should run on .s source files rather than using llc to generate the
-;       assembly.
+;       assembly. There's also a large number of instruction encodings the
+;       compiler never generates, so we need the integrated assembler to be
+;       able to test those at all.
 
 define i32 @foo(i32 %a, i32 %b) {
 entry: