Define a ClassPrefix for PowerPC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15580 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCInstrFormats.td

@@ -56,6 +56,7 @@ class PPC32I<string name, bits<6> opcode, bit ppc64, bit vmx> : Instruction {
 
   let Name = name;
   let Namespace = "PPC32";
+  let ClassPrefix = "PowerPC";
   let Inst{0-5} = opcode;
 }