Hugetlbfs is not module'able at current state, so tristate the "HugeTLB
file system support" option is kind of silly.  Also, at present you can
set CONFIG_HUGETLB_PAGE and not CONFIG_HUGETLBFS, which give the kernel
low-level hugepage support, but no userspace API to access it is also
kind of silly.

While I'm at it, here is a patch that flips dependency around:
CONFIG_HUGETLB_PAGE mirrors CONFIG_HUGETLBFS option and hugetlb page
size selection appear/disappear depending on whether hugetlbfs is
selected or not.  (this is taken from 2.6).

- Ken