UPSTREAM: tracing: make PREEMPTIRQ_EVENTS depend on TRACING

When CONFIG_TRACING is disabled, the new preemptirq events tracer
produces a build failure:

In file included from kernel/trace/trace_irqsoff.c:17:0:
kernel/trace/trace.h: In function 'trace_test_and_set_recursion':
kernel/trace/trace.h:542:28: error: 'struct task_struct' has no member named 'trace_recursion'

Adding an explicit dependency avoids the broken configuration.

Link: http://lkml.kernel.org/r/20171103104031.270375-1-arnd@arndb.de



Fixes: d59158162e03 ("tracing: Add support for preempt and irq enable/disable events")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
(cherry picked from commit 2dde6b0034dbc050957cdb6539ce28eca57e8cdf)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ib5c18084d142d3a6b2d1c72ddf194e425996b263