target-i386: xsave: Calculate set of xsave components on realize Instead of doing complex calculations and calling kvm_arch_get_supported_cpuid() inside cpu_x86_cpuid(), calculate the set of required XSAVE components earlier, at realize time. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>