[WebAssembly] Remove unneeded target operand flags

This change is in preparation for the addition of new target
operand flags for new relocation types.  Have a symbol type as part
of the flag set makes it harder to use and AFAICT these are serving
no purpose.

Differential Revision: https://reviews.llvm.org/D60014

llvm-svn: 357548
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.h b/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.h
index 125ba1d..2c375a0 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.h
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.h
@@ -32,8 +32,7 @@
 
   MCSymbol *GetGlobalAddressSymbol(const MachineOperand &MO) const;
   MCSymbol *GetExternalSymbolSymbol(const MachineOperand &MO) const;
-  MCOperand lowerSymbolOperand(MCSymbol *Sym, int64_t Offset, bool IsFunc,
-                               unsigned flags) const;
+  MCOperand lowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const;
 
 public:
   WebAssemblyMCInstLower(MCContext &ctx, WebAssemblyAsmPrinter &printer)