drivers/clk/clk-fixed.c: Fix sparse warning

drivers/clk/clk-fixed.c:35:16: warning: symbol 'clk_fixed_ops' was not declared. Should it be static?

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers/clk/clk-fixed.c

@@ -32,7 +32,7 @@ static unsigned long clk_fixed_recalc_rate(struct clk *clk,
 	return fix->rate;
 }
 
-struct clk_ops clk_fixed_ops = {
+static struct clk_ops clk_fixed_ops = {
 	.recalc_rate = clk_fixed_recalc_rate,
 	.is_enabled = clk_is_enabled_always,
 };