Fix the bad addr check to check for allowable addresses in the nxm address space

Fix the bad addr check to check for allowable addresses in the nxm address space

arch/alpha/alpha_tru64_process.cc:
sim/process.cc:
sim/process.hh:
    Add an address range for the nxm
sim/syscall_emul.hh:
    Check to make sure that if we have an nxm config space that the mmap hasn't grown into it

--HG--
extra : convert_revision : e479e5240080ae488080d228bafea488835d6e77