[mips] [IAS] Refactor the emitDirectiveModuleOddSPReg() functions. NFC.

Summary:
We can simplify emitDirectiveModuleOddSPReg() by having it print the current OddSPReg information
from MipsABIFlagsSection and doing an updateABIInfo() before such calls.

This prevents us from forgetting to update the STI.FeatureBits, because updateABIInfo() uses those to update the MipsABIFlagsSection object,
and also makes sure we use the update mechanism from MipsABIFlagsSection.

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits, mpf

Differential Revision: http://reviews.llvm.org/D10641

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240630 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MipsAsmPrinter.cpp

@@ -747,8 +747,7 @@ void MipsAsmPrinter::EmitStartOfAsmFile(Module &M) {
   // accept it. We therefore emit it when it contradicts the default or an
   // option has changed the default (i.e. FPXX) and omit it otherwise.
   if (ABI.IsO32() && (!STI.useOddSPReg() || STI.isABI_FPXX()))
-    getTargetStreamer().emitDirectiveModuleOddSPReg(STI.useOddSPReg(),
-                                                    ABI.IsO32());
+    getTargetStreamer().emitDirectiveModuleOddSPReg();
 }
 
 void MipsAsmPrinter::emitInlineAsmStart() const {