Make r242655 build on sparc64. While at it, make vm_{max,min}_kernel_address vm_offset_t as they should be.
Make r242655 build on sparc64. While at it, make vm_{max,min}_kernel_address
vm_offset_t as they should be.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase