Add PPC Freescale e500mc and e5500 subtargets.

Add subtargets for Freescale e500mc (32-bit) and e5500 (64-bit) to
the PowerPC backend.

Patch by Tobias von Koch.

llvm-svn: 162764
diff --git a/llvm/lib/Target/PowerPC/PPCSubtarget.h b/llvm/lib/Target/PowerPC/PPCSubtarget.h
index 0207c83..b8b1614 100644
--- a/llvm/lib/Target/PowerPC/PPCSubtarget.h
+++ b/llvm/lib/Target/PowerPC/PPCSubtarget.h
@@ -41,6 +41,8 @@
     DIR_750, 
     DIR_970, 
     DIR_A2,
+    DIR_E500mc,
+    DIR_E5500,
     DIR_PWR6,
     DIR_PWR7,
     DIR_64