add proper encoding for MTCRF instead of using a hack.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119121 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index 05fdbeb..add8009 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -304,6 +304,7 @@
 }
 def crbitm: Operand<i8> {
   let PrintMethod = "printcrbitm";
+  let EncoderMethod = "get_crbitm_encoding";
 }
 // Address operands
 def memri : Operand<iPTR> {