perf/x86/intel: Make dev_attr_allow_tsx_force_abort static

Fixes: 400816f60c54 ("perf/x86/intel: Implement support for TSX Force Abort")
Signed-off-by: kbuild test robot <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Cc: "Peter Zijlstra (Intel)" <[e-mail]>
Cc: [e-mail]
Cc: Borislav Petkov <[e-mail]>
Cc: "H. Peter Anvin" <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: [e-mail]
Link: https://lkml.kernel.org/r/20190313184243.GA10820@lkp-sb-ep06

arch/x86/events/intel/core.c

···
        NULL
 };
 
-DEVICE_BOOL_ATTR(allow_tsx_force_abort, 0644, allow_tsx_force_abort);
+static DEVICE_BOOL_ATTR(allow_tsx_force_abort, 0644, allow_tsx_force_abort);
 
 static struct attribute *intel_pmu_attrs[] = {
 	&dev_attr_freeze_on_smi.attr,