tracing: Fix spelling mistake in Kconfig "infinit" -> "infinite"

There is a spelling mistake in the Kconfig help text. Fix it.

Link: https://lkml.kernel.org/r/20201216114051.12056-1-colin.king@canonical.com



Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>