powerpc/kprobes: Fix ABIv2 issues with kprobe_lookup_name
powerpc/kprobes: Fix ABIv2 issues with kprobe_lookup_name

Use ppc_function_entry in places where we previously assumed
function descriptors exist.

Signed-off-by: Anton Blanchard <14deb5e5e417133e888bf47bb6a3555c9bb7d81c@samba.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs