sysemu/kvm: Restrict hvf_get_supported_cpuid() to x86 targets

sysemu/kvm: Restrict hvf_get_supported_cpuid() to x86 targets

hvf_get_supported_cpuid() is only defined for x86 targets
(in target/i386/hvf/x86_cpuid.c).
Its declaration is pointless on all other targets.

All the calls to it in target/i386/cpu.c are guarded by
a call on hvf_enabled(), so are elided when HVF is not
built in. Therefore we can remove the unnecessary function
stub.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231004092510.39498-3-philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>