clk: Add missing header for 'bool' definition to clk-conf.h

of_clk_set_defaults uses the type 'bool', but clk-conf.h does not
include its definition.

This results in a compile error when only clk-conf.h is used.

Signed-off-by: Chen-Yu Tsai <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

include/linux/clk/clk-conf.h

···
  * published by the Free Software Foundation.
  */
 
+#include <linux/types.h>
+
 struct device_node;
 
 #if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)