ASoC: fix checking for external widgets bug

In SOC DAPM layer of SOUND subsystem, when add signal route (in the
function snd_soc_dapm_add_route() ), the original code has wrong logic
when dapm layer check each widget whether an external one.

Signed-off-by: Rongrong Cao <rrcao@ambarella.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/soc-dapm.c

@@ -1293,8 +1293,8 @@ static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
 	if (wsink->id == snd_soc_dapm_input) {
 		if (wsource->id == snd_soc_dapm_micbias ||
 			wsource->id == snd_soc_dapm_mic ||
-			wsink->id == snd_soc_dapm_line ||
-			wsink->id == snd_soc_dapm_output)
+			wsource->id == snd_soc_dapm_line ||
+			wsource->id == snd_soc_dapm_output)
 			wsink->ext = 1;
 	}
 	if (wsource->id == snd_soc_dapm_output) {