lockup_detector: Adapt CONFIG_PERF_EVENT_NMI to other archs

CONFIG_PERF_EVENT_NMI is something that need to be enabled from the
arch. This is fine on x86 as PERF_EVENTS is builtin but if other
archs select it, they will need to handle the PERF_EVENTS dependency.

Instead, handle the dependency in the generic layer:

- archs need to tell what they support through HAVE_PERF_EVENTS_NMI
- Enable magically PERF_EVENTS_NMI if we have PERF_EVENTS and
  HAVE_PERF_EVENTS_NMI.
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>

arch/Kconfig

@@ -145,4 +145,7 @@ config HAVE_HW_BREAKPOINT
 config HAVE_USER_RETURN_NOTIFIER
 	bool
 
+config HAVE_PERF_EVENTS_NMI
+	bool
+
 source "kernel/gcov/Kconfig"

arch/x86/Kconfig

@@ -54,7 +54,7 @@ config X86
 	select HAVE_KERNEL_LZO
 	select HAVE_HW_BREAKPOINT
 	select PERF_EVENTS
-	select PERF_EVENTS_NMI
+	select HAVE_PERF_EVENTS_NMI
 	select ANON_INODES
 	select HAVE_ARCH_KMEMCHECK
 	select HAVE_USER_RETURN_NOTIFIER

init/Kconfig

@@ -943,8 +943,7 @@ config PERF_USE_VMALLOC
 	  See tools/perf/design.txt for details
 
 config PERF_EVENTS_NMI
-	bool
-	depends on PERF_EVENTS
+	def_bool PERF_EVENTS && HAVE_PERF_EVENTS_NMI
 	help
 	  System hardware can generate an NMI using the perf event
 	  subsystem.  Also has support for calculating CPU cycle events