clkdev: Export clk_register_clkdev

So it can be used from modules such as clk-test.ko.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>

drivers/clk/clkdev.c

@@ -377,6 +377,7 @@ int clk_register_clkdev(struct clk *clk, const char *con_id,
 
 	return 0;
 }
+EXPORT_SYMBOL(clk_register_clkdev);
 
 /**
  * clk_register_clkdevs - register a set of clk_lookup for a struct clk