Revert change to function alignment b/c existing logic was fine

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142224 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index dcc0568..d6b8a9e 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -402,16 +402,9 @@
     setLibcallName(RTLIB::EXP2_PPCF128, "exp2l$LDBL128");
   }
 
-  if (PPCSubTarget.isBookE()) {
-    // Book E: Instructions are always four bytes long and word-aligned.
-    setMinFunctionAlignment(4);
-    setPrefFunctionAlignment(8);
-  }
-  else {
-    setMinFunctionAlignment(2);
-    if (PPCSubTarget.isDarwin())
-      setPrefFunctionAlignment(4);
-  }
+  setMinFunctionAlignment(2);
+  if (PPCSubTarget.isDarwin())
+    setPrefFunctionAlignment(4);
 
   setInsertFencesForAtomic(true);