linux-imx

tracing: Add ftrace_hash_key() helper function

Replace the couple of use cases that has small logic to produce the ftrace
function key id with a helper function. No need for duplicate code.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>