ASoC: Add source argument to PLL configuration

More and more devices feature PLLs and FLLs with the ability to select
between multiple input clocks. In order to better support these devices
a new argument, source, has been added to the set_pll() configuration
API. Using set_clkdiv() is often difficult due to the need to stop the
PLL/FLL before any reconfiguration can be done.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 97ca9af..16963d4 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -106,7 +106,7 @@
 	int div_id, int div);
 
 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
-	int pll_id, unsigned int freq_in, unsigned int freq_out);
+	int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
 
 /* Digital Audio interface formatting */
 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
@@ -136,8 +136,8 @@
 	 */
 	int (*set_sysclk)(struct snd_soc_dai *dai,
 		int clk_id, unsigned int freq, int dir);
-	int (*set_pll)(struct snd_soc_dai *dai,
-		int pll_id, unsigned int freq_in, unsigned int freq_out);
+	int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
+		unsigned int freq_in, unsigned int freq_out);
 	int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
 
 	/*