hppa: Delete unused hppa_cpu_list() function

hppa: Delete unused hppa_cpu_list() function

hppa_cpu_list() is dead code and is never called.  Delete it.

Cc: Richard Henderson <rth@twiddle.net>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190517191332.23400-1-ehabkost@redhat.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>