bpfRingbufProg: use simplified DEFINE_BPF_RINGBUF() macro am: 210bb980b9

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/3255937

Change-Id: Ieee8a87d6772195685c78593b3646a62d037f7f1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>