[NFC][Clang] Fix typo in feature predicate insertion

Due to a botched merge, we currently emit volatile loads from feature
predicate globals. These are never foldable, which breaks things. This
does not apply to the upstream patch currently under review.

Commiting on behalf of github user @AlexVlx

Author: lamb-j

clang/lib/CodeGen/TargetBuiltins/AMDGPU.cpp

@@ -304,7 +304,7 @@ static Value *GetOrInsertAMDGPUPredicate(CodeGenFunction &CGF, Twine Name) {
   P->setExternallyInitialized(true);
 
   return CGF.Builder.CreateLoad(
-      RawAddress(P, PTy, CharUnits::One(), KnownNonNull), true);
+      RawAddress(P, PTy, CharUnits::One(), KnownNonNull));
 }
 
 Value *CodeGenFunction::EmitAMDGPUBuiltinExpr(unsigned BuiltinID,

clang/test/CodeGen/amdgpu-builtin-is-invocable.c

@@ -28,7 +28,7 @@
 // AMDGCNSPIRV-LABEL: define spir_func void @foo(
 // AMDGCNSPIRV-SAME: ) addrspace(4) #[[ATTR0:[0-9]+]] {
 // AMDGCNSPIRV-NEXT:  [[ENTRY:.*:]]
-// AMDGCNSPIRV-NEXT:    [[TMP0:%.*]] = load volatile i1, ptr addrspace(1) @llvm.amdgcn.has.gfx10-insts, align 1
+// AMDGCNSPIRV-NEXT:    [[TMP0:%.*]] = load i1, ptr addrspace(1) @llvm.amdgcn.has.gfx10-insts, align 1
 // AMDGCNSPIRV-NEXT:    [[TOBOOL:%.*]] = icmp ne i1 [[TMP0]], false
 // AMDGCNSPIRV-NEXT:    br i1 [[TOBOOL]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
 // AMDGCNSPIRV:       [[IF_THEN]]:

clang/test/CodeGen/amdgpu-builtin-processor-is.c

@@ -26,7 +26,7 @@
 // AMDGCNSPIRV-LABEL: define spir_func void @foo(
 // AMDGCNSPIRV-SAME: ) addrspace(4) #[[ATTR0:[0-9]+]] {
 // AMDGCNSPIRV-NEXT:  [[ENTRY:.*:]]
-// AMDGCNSPIRV-NEXT:    [[TMP0:%.*]] = load volatile i1, ptr addrspace(1) @llvm.amdgcn.is.gfx900, align 1
+// AMDGCNSPIRV-NEXT:    [[TMP0:%.*]] = load i1, ptr addrspace(1) @llvm.amdgcn.is.gfx900, align 1
 // AMDGCNSPIRV-NEXT:    [[TOBOOL:%.*]] = icmp ne i1 [[TMP0]], false
 // AMDGCNSPIRV-NEXT:    br i1 [[TOBOOL]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
 // AMDGCNSPIRV:       [[IF_THEN]]: