config: disable unprivileged BPF by default (jsc#SLE-22573)
    
    Backport of mainline commit 8a03e56b253e ("bpf: Disallow unprivileged bpf
    by default") only changes kconfig default, used e.g. for "make oldconfig"
    when the config option is missing, but does not update our kernel configs
    used for build. Update also these to make sure unprivileged BPF is really
    disabled by default.