Provisional fix for bug 3508 - Persistent storage support breaks Linux compatibility. Enables libnvmemmory.so to be built and dynamically linked on Linux and rom boot reports persistent storage image created OK, but ROM then crashes.

#include "hw/hw.h"
#include "hw/boards.h"

void register_machines(void)
{
    qemu_register_machine(&shix_machine);
    qemu_register_machine(&r2d_machine);
}