sh: move sh clock.c contents to drivers/sh/clk.

This patch is V2 of the SH clock framework move from
arch/sh/kernel/cpu/clock.c to drivers/sh/clk.c. All
code except the following functions are moved:
clk_init(), clk_get() and clk_put().

The init function is still kept in clock.c since it
depends on the SH-specific machvec implementation.

The symbols clk_get() and clk_put() already exist in
the common ARM clkdev code, those symbols are left in
the SH tree to avoid duplicating them for SH-Mobile ARM.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

include/linux/sh_clk.h

@@ -47,13 +47,13 @@ struct clk {
 #define CLK_ENABLE_ON_INIT	(1 << 0)
 
 /* arch/sh/kernel/cpu/clock.c */
-int clk_init(void);
 unsigned long followparent_recalc(struct clk *);
 void recalculate_root_clocks(void);
 void propagate_rate(struct clk *);
 int clk_reparent(struct clk *child, struct clk *parent);
 int clk_register(struct clk *);
 void clk_unregister(struct clk *);
+void clk_enable_init_clocks(void);
 
 /* the exported API, in addition to clk_set_rate */
 /**