tracing: Document HAVE_SYSCALL_TRACEPOINTS needs

Document the arch needed requirements to get the support for syscalls
tracing.

v2: HAVE_FTRACE_SYSCALLS have been changed to HAVE_SYSCALL_TRACEPOINTS
    recently. Update this config name in the documentation then.

Signed-off-by: Frederic Weisbecker <[email protected]>
Acked-by: Heiko Carstens <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Li Zefan <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Jason Baron <[email protected]>
Cc: Lai Jiangshan <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Paul Mundt <[email protected]>

0 files changed, 0 insertions, 0 deletions