at91_emac.c: fix 'Warning: eth device name has a space!'

This patch also removes conditional nameing of at91_emac driver whether it's
connection to PHY is RMII or MII.

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/drivers/net/at91_emac.c b/drivers/net/at91_emac.c
index d82459b..009a275 100644
--- a/drivers/net/at91_emac.c
+++ b/drivers/net/at91_emac.c
@@ -500,11 +500,7 @@
 	memset(emacfix, 0, sizeof(emac_device));
 
 	memset(dev, 0, sizeof(*dev));
-#ifndef CONFIG_RMII
-	sprintf(dev->name, "AT91 EMAC");
-#else
-	sprintf(dev->name, "AT91 EMAC RMII");
-#endif
+	sprintf(dev->name, "emac");
 	dev->iobase = iobase;
 	dev->priv = emacfix;
 	dev->init = at91emac_init;