sh: ftrace support.

This adds support for ftrace to SH. This only includes CONFIG_FTRACE,
and does not handle dynamic ftrace presently.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index adef42c..38a5a9e 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -24,6 +24,7 @@
 	select HAVE_KPROBES
 	select HAVE_KRETPROBES
 	select HAVE_ARCH_TRACEHOOK if !SH_FPU
+	select HAVE_FTRACE
 
 config SUPERH64
 	def_bool y if CPU_SH5