UPSTREAM: trace,smp: Trace all smp_function_call*() invocations

(Ab)use the trace_ipi_send_cpu*() family to trace all
smp_function_call*() invocations, not only those that result in an
actual IPI.

The queued entries log their callback function while the actual IPIs
are traced on generic_smp_call_function_single_interrupt().

Bug: 326196720
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
(cherry picked from commit 5c312497)
Signed-off-by: Qais Yousef <qyousef@google.com>
Change-Id: I3ccd1cce390af1003c3acfa0cc8849aa046d9e71
(cherry picked from commit 1d0e24b6cc9c9c31e680f628e1a90df450c4df08)
Signed-off-by: Qais Yousef <qyousef@google.com>