[AVR] Compile the disassembler

This also updates references of 'TheAVRTarget' to the new
'getTheAVRTarget()' method.

llvm-svn: 285272
diff --git a/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp b/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
index ae87d64..d2a21fb 100644
--- a/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
+++ b/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
@@ -45,10 +45,6 @@
 };
 }
 
-namespace llvm {
-extern Target TheAVRTarget;
-}
-
 static MCDisassembler *createAVRDisassembler(const Target &T,
                                              const MCSubtargetInfo &STI,
                                              MCContext &Ctx) {
@@ -58,7 +54,7 @@
 
 extern "C" void LLVMInitializeAVRDisassembler() {
   // Register the disassembler.
-  TargetRegistry::RegisterMCDisassembler(TheAVRTarget,
+  TargetRegistry::RegisterMCDisassembler(getTheAVRTarget(),
                                          createAVRDisassembler);
 }