Fix @ -> <at> substitution

When applying the AT91CAP9 patches upstream, something transformed
the '@' character into the ' <at> ' sequence.

The patch below restores the original form in all the places where
it has been modified (the AT91CAP9 files, the AT91SAM9260 files which
were copied from AT91CAP9, and a couple of other files where the
' <at> ' sequence was present).

Signed-off-by: Stelian Pop <stelian@popies.net>
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index d22c889..c17dcf4 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -1,7 +1,7 @@
 /*
  * SMSC LAN9[12]1[567] Network driver
  *
- * (c) 2007 Pengutronix, Sascha Hauer <s.hauer <at> pengutronix.de>
+ * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
  *
  * See file CREDITS for list of people who contributed to this
  * project.