6254431 GDT should reside on its own page

[russell.bla...@sun.com]

Author: rab
Repository: /hg/onnv/onnv-gate
Revision: d9f6f6d7126fa5e2b0a700af6f4b56039f31be28
Log message:
6254431 GDT should reside on its own page

Files:
        update: usr/src/uts/i86pc/os/mp_startup.c
        update: usr/src/uts/i86pc/sys/rm_platter.h
        update: usr/src/uts/intel/ia32/ml/desctbls_asm.s
        update: usr/src/uts/intel/ia32/os/desctbls.c
        update: usr/src/uts/intel/sys/segments.h