In the
./hotspot/src/cpu/aarch64/vm/c1_LIRAssembler_aarch64.hpp

there is

#ifndef CPU_X86_VM_C1_LIRASSEMBLER_X86_HPP
#define CPU_X86_VM_C1_LIRASSEMBLER_X86_HPP

should be something more like

#ifndef CPU_AARCH64_VM_C1_LIRASSEMBLER_AARCH64_HPP
#define CPU_AARCH64_VM_C1_LIRASSEMBLER_AARCH64_HPP