clk: bcm/kona: Remove ccu_list

This list doesn't look to be used. Let's remove it and any
associated code that would be manipulating this list. This also
silences this error:

drivers/clk/bcm/clk-kona-setup.c:24:1: warning: symbol 'ccu_list' was not declared. Should it be static?

Reviewed-by: Alex Elder <elder@linaro.org>
Cc: Tim Kryger <tim.kryger@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/bcm/clk-kona.h

@@ -480,7 +480,6 @@ struct ccu_data {
 	spinlock_t lock;	/* serialization lock */
 	bool write_enabled;	/* write access is currently enabled */
 	struct ccu_policy policy;
-	struct list_head links;	/* for ccu_list */
 	struct device_node *node;
 	struct clk_onecell_data clk_data;
 	const char *name;
@@ -492,7 +491,6 @@ struct ccu_data {
 #define KONA_CCU_COMMON(_prefix, _name, _ccuname)			    \
 	.name		= #_name "_ccu",				    \
 	.lock		= __SPIN_LOCK_UNLOCKED(_name ## _ccu_data.lock),    \
-	.links		= LIST_HEAD_INIT(_name ## _ccu_data.links),	    \
 	.clk_data	= {						    \
 		.clk_num = _prefix ## _ ## _ccuname ## _CCU_CLOCK_COUNT,    \
 	}