[PPC][NFC] Renaming things with 'xxinsert' moniker to 'vecinsert' to make it more general.

Commit on behalf of Graham Yiu (gyiu@ca.ibm.com)

llvm-svn: 312547
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.h b/llvm/lib/Target/PowerPC/PPCISelLowering.h
index b5577a4..591f2ee 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.h
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.h
@@ -94,15 +94,15 @@
       ///
       XXSPLT,
 
-      /// XXINSERT - The PPC VSX insert instruction
+      /// VECINSERT - The PPC vector insert instruction
       ///
-      XXINSERT,
+      VECINSERT,
 
       /// XXREVERSE - The PPC VSX reverse instruction
       ///
       XXREVERSE,
 
-      /// VECSHL - The PPC VSX shift left instruction
+      /// VECSHL - The PPC vector shift left instruction
       ///
       VECSHL,