hugetlb_madv_vs_map selftest was not part of the mm test-suite since we
didn't have a fix for the problem it found.

Now that the problem is already fixed (see previous commit), let's enable
this selftest in the default test-suite.

Link: https://lkml.kernel.org/r/20240205191843.4009640-3-leitao@debian.orgSigned-off-by: Breno Leitao <leitao@debian.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Rik van Riel <riel@surriel.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>