In commit 537c3f66eac1 ("selftests/bpf: add generic BPF program
tester-loader"), a new mechanism was added to the BPF selftest framework
to allow testsuites to use macros to define expected failing testcases.
This allows any testsuite which tests verification failure to remove a
good amount of boilerplate code. This patch updates the task_kfunc
selftest suite to use these new macros.
Signed-off-by: David Vernet <void@xxxxxxxxxxxxx>