The only address space where the GIC devices are added is
address_space_memory.  There is no need to use a global
MemoryListener.

This removes the only user of global MemoryListeners.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
[PMM: added missing #include "exec/address-spaces.h"]
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Message-id: 1475219846-32609-1-git-send-email-pbonzini@redhat.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>