PowerPC: Canonicalize access to function attributes, NFC

Canonicalize access to function attributes to use the simpler API.

getAttributes().getAttribute(AttributeSet::FunctionIndex, Kind)
  => getFnAttribute(Kind)

getAttributes().hasAttribute(AttributeSet::FunctionIndex, Kind)
  => hasFnAttribute(Kind)

llvm-svn: 229224
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index 0765638..5b419a5 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -7181,8 +7181,7 @@
   // Naked functions never have a base pointer, and so we use r1. For all
   // other functions, this decision must be delayed until during PEI.
   unsigned BaseReg;
-  if (MF->getFunction()->getAttributes().hasAttribute(
-          AttributeSet::FunctionIndex, Attribute::Naked))
+  if (MF->getFunction()->hasFnAttribute(Attribute::Naked))
     BaseReg = Subtarget.isPPC64() ? PPC::X1 : PPC::R1;
   else
     BaseReg = Subtarget.isPPC64() ? PPC::BP8 : PPC::BP;
@@ -9721,8 +9720,7 @@
   // Naked functions never have a frame pointer, and so we use r1. For all
   // other functions, this decision must be delayed until during PEI.
   unsigned FrameReg;
-  if (MF.getFunction()->getAttributes().hasAttribute(
-        AttributeSet::FunctionIndex, Attribute::Naked))
+  if (MF.getFunction()->hasFnAttribute(Attribute::Naked))
     FrameReg = isPPC64 ? PPC::X1 : PPC::R1;
   else
     FrameReg = isPPC64 ? PPC::FP8 : PPC::FP;