Replace __attribute references with __attribute__

__attribute__ follows gcc's documented syntax and is generally more
common than __attribute.  This change is only asthetic and should not
affect functionality.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/net/eth.c b/net/eth.c
index 4bbf84b..c6fa5b9 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -68,8 +68,8 @@
 {
 	return -1;
 }
-int cpu_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
-int board_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
+int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
+int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
 
 extern int mv6436x_eth_initialize(bd_t *);
 extern int mv6446x_eth_initialize(bd_t *);