[M68k] Use non-deprecated CasesLower

Author: MaskRay

llvm/lib/Target/M68k/MCTargetDesc/M68kAsmBackend.cpp

@@ -49,7 +49,7 @@ class M68kAsmBackend : public MCAsmBackend {
   M68kAsmBackend(const Target &T, const MCSubtargetInfo &STI)
       : MCAsmBackend(llvm::endianness::big),
         Allows32BitBranch(llvm::StringSwitch<bool>(STI.getCPU())
-                              .CasesLower("m68020", "m68030", "m68040", true)
+                              .CasesLower({"m68020", "m68030", "m68040"}, true)
                               .Default(false)) {}
 
   void applyFixup(const MCFragment &, const MCFixup &, const MCValue &,