rtmutex: Have slowfn of rt_mutex_timed_fastlock() use enum

The backport of commit 8930ed80f970 "rtmutex: Cleanup deadlock detector
debug logic" had conflicts, and the conflict resolution changed
rt_mutex_timed_fastlock()'s parameter to an enum, but missed changing its
slowfn's prototype.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
1 file changed