Add lttng_ust_notrace to static inline functions

The static inline functions
__tracepoint_provider_mismatch_<TRACEPOINT_PROVIDER> and
__tracepoint_provider_check_<TRACEPOINT_PROVIDER> are missing the
lttng_ust_notrace attribute to prevent them from getting instrumented
with -finstrument-functions (if e.g. defined in CFLAGS). This patch is
adding the attribute to those functions.

Signed-off-by: Paul Woegerer <paul_woegerer@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>