arm ti: Stop checking for failures from malloc(M_WAITOK)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D45852
(cherry picked from commit fe6985ef87e1aedf8e5c9b3b959c7dd54a03e2fe)
(cherry picked from commit 920288c32900da48136eafc41aa6d020552e36e5)