Blackfin: update ftrace_push_return_trace() breakage

Commit 71e308a239c updated ftrace_push_return_trace() prototype but didn't
update the Blackfin ftrace code, so things broke.  Since we don't support
the new stuff yet, call it with stub values.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
1 file changed