Revert "KVM: VMX: Fix KVM_SET_SREGS with big real mode segments"

This reverts commit b398aa31.  It
causes a regression with some versions of ipxe.  3.6 has other fixes
that cannot be backported to 3.5, so it is better to live with the
minor problem that b398aa31 fixes.

https://bugzilla.redhat.com/show_bug.cgi?id=854983



Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>