ASoC: simple_card_utils: add EXPORT_SYMBOL_GPL() for asoc_simple_card_clk_xxx()

commit 891caea4 ("ASoC: simple_card_utils:
add asoc_simple_card_clk_xxx()") added new asoc_simple_card_clk_xxx(),
but, it didn't have EXPORT_SYMBOL_GPL().
This patch adds it. Otherwise, we will get below error

ERROR: "asoc_simple_card_clk_enable" [sound/soc/generic/snd-soc-simple-scu-card.ko] undefined!
ERROR: "asoc_simple_card_clk_disable" [sound/soc/generic/snd-soc-simple-scu-card.ko] undefined!
ERROR: "asoc_simple_card_clk_enable" [sound/soc/generic/snd-soc-simple-card.ko] undefined!
ERROR: "asoc_simple_card_clk_disable" [sound/soc/generic/snd-soc-simple-card.ko] undefined!
ERROR: "asoc_simple_card_clk_enable" [sound/soc/generic/snd-soc-audio-graph-scu-card.ko] undefined!
ERROR: "asoc_simple_card_clk_disable" [sound/soc/generic/snd-soc-audio-graph-scu-card.ko] undefined!
ERROR: "asoc_simple_card_clk_enable" [sound/soc/generic/snd-soc-audio-graph-card.ko] undefined!
ERROR: "asoc_simple_card_clk_disable" [sound/soc/generic/snd-soc-audio-graph-card.ko] undefined!
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/simple-card-utils.c

@@ -120,11 +120,13 @@ int asoc_simple_card_clk_enable(struct asoc_simple_dai *dai)
 {
 	return clk_prepare_enable(dai->clk);
 }
+EXPORT_SYMBOL_GPL(asoc_simple_card_clk_enable);
 
 void asoc_simple_card_clk_disable(struct asoc_simple_dai *dai)
 {
 	clk_disable_unprepare(dai->clk);
 }
+EXPORT_SYMBOL_GPL(asoc_simple_card_clk_disable);
 
 int asoc_simple_card_parse_clk(struct device *dev,
 			       struct device_node *node,