ASoC: Rename AT91SAMG20-EK for applications

This is a bit more idiomatic and makes identifying a configuration
based on the board type work better.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
index ab32514..aa52423 100644
--- a/sound/soc/atmel/sam9g20_wm8731.c
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -273,7 +273,7 @@
 };
 
 static struct snd_soc_card snd_soc_at91sam9g20ek = {
-	.name = "WM8731",
+	.name = "AT91SAMG20-EK",
 	.platform = &atmel_soc_platform,
 	.dai_link = &at91sam9g20ek_dai,
 	.num_links = 1,