CVE-2022-48998 powerpc/bpf/32: Fix Oops on tail call tests

In the Linux kernel, the following vulnerability has been resolved: powerpc/bpf/32: Fix Oops on tail call tests testbpf tail call tests end up as: testbpf: 0 Tail call leaf jited:1 85 PASS testbpf: 1 Tail call 2 jited:1 111 PASS testbpf: 2 Tail call 3 jited:1 145 PASS testbpf: 3 Tail call 4 jited...