clk: Remove comment for end of CONFIG_COMMON_CLK section

The comment is inaccurate (it actually ends the CONFIG_COMMON_CLK
section, there's no else) and given that we've just got a single level
of ifdef isn't really needed anyway.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

include/linux/clk.h

@@ -81,7 +81,7 @@ int clk_notifier_register(struct clk *clk, struct notifier_block *nb);
 
 int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb);
 
-#endif /* !CONFIG_COMMON_CLK */
+#endif
 
 /**
  * clk_get - lookup and obtain a reference to a clock producer.