Add AArch64 requirement for aarch64_fnmadd.ll

Author: MDevereau

llvm/test/CodeGen/AArch64/aarch64_fnmadd.ll

@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
 ; RUN: llc < %s -mtriple=aarch64-linux-gnu -O3 | FileCheck %s
+; REQUIRES: aarch64-registered-target
 
 define void @fnmaddd(ptr %a, ptr %b, ptr %c) {
 ; CHECK-LABEL: fnmaddd: