[PowerPC] Add support for TLS data relocations

This adds support for TLS data relocations and modifiers:
       .quad target@dtpmod
       .quad target@tprel
       .quad target@dtprel
Currently exploited by the asm parser only.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185394 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCExpr.cpp b/lib/MC/MCExpr.cpp
index 0b0fb79..c777e64 100644
--- a/lib/MC/MCExpr.cpp
+++ b/lib/MC/MCExpr.cpp
@@ -211,6 +211,7 @@
   case VK_PPC_TOC_LO: return "toc@l";
   case VK_PPC_TOC_HI: return "toc@h";
   case VK_PPC_TOC_HA: return "toc@ha";
+  case VK_PPC_DTPMOD: return "dtpmod";
   case VK_PPC_TPREL: return "tprel";
   case VK_PPC_TPREL_LO: return "tprel@l";
   case VK_PPC_TPREL_HI: return "tprel@h";
@@ -342,6 +343,8 @@
     .Case("toc@ha", VK_PPC_TOC_HA)
     .Case("TLS", VK_PPC_TLS)
     .Case("tls", VK_PPC_TLS)
+    .Case("DTPMOD", VK_PPC_DTPMOD)
+    .Case("dtpmod", VK_PPC_DTPMOD)
     .Case("TPREL", VK_PPC_TPREL)
     .Case("tprel", VK_PPC_TPREL)
     .Case("TPREL@L", VK_PPC_TPREL_LO)