Revert "bpf: Remove unused insn_cnt argument from visit_[func_call_]insn()"

This reverts commit 97bb6dab which is
commit dcb2288b upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I54a313a185430628b10240a94a96de8353040111
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>