remove set_fs for UML

[Christoph Hellwig]

Hi Richard and Anton,

this series removes address space overrides using set_fs for UML.

Diffstat:
 um/Kconfig                   |    1 -
 um/include/asm/thread_info.h |    4 ----
 um/include/asm/uaccess.h     |   21 +++++++++++++++++++--
 um/kernel/skas/uaccess.c     |   25 -------------------------
 x86/include/asm/mtrr.h       |    8 +-------
 x86/kernel/setup.c           |    7 ++++++-
 x86/um/asm/segment.h         |    8 --------
 7 files changed, 26 insertions(+), 48 deletions(-)