sh: add enable()/disable()/set_rate() to div6 code

This patch updates the div6 clock helper code to add support
for enable(), disable() and set_rate() callbacks.

Needed by the camera clock enabling board code on Migo-R.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/clock.h b/arch/sh/include/asm/clock.h
index 026b9da..9fe7d7f 100644
--- a/arch/sh/include/asm/clock.h
+++ b/arch/sh/include/asm/clock.h
@@ -119,6 +119,10 @@
 			  struct cpufreq_frequency_table *freq_table,
 			  unsigned long rate);
 
+int clk_rate_table_find(struct clk *clk,
+			struct cpufreq_frequency_table *freq_table,
+			unsigned long rate);
+
 #define SH_CLK_MSTP32(_name, _id, _parent, _enable_reg,	\
 	    _enable_bit, _flags)			\
 {							\