clk: export __clk_get_flags for modular clock providers

The common clock api provides some helpers for clk-providers but does
not export these helpers. This hinders clk-providers to be built as modules.
This patch adds __clk_get_flags() to the list of exported symbols.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index d65ef17..20ce67f 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -458,6 +458,7 @@
 			clk->ops->unprepare(clk->hw);
 	}
 }
+EXPORT_SYMBOL_GPL(__clk_get_flags);
 
 /* caller must hold prepare_lock */
 static void clk_disable_unused_subtree(struct clk *clk)