ps2.c only needs to be compiled if we are building pckbd.c or pl050.c.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20190411182240.5957-1-thuth@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>