driver: tty: serial: remove cast for kzalloc return value

remove cast for kzalloc return value.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c
index bc9e6b01..18ed5ae 100644
--- a/drivers/tty/serial/icom.c
+++ b/drivers/tty/serial/icom.c
@@ -1415,8 +1415,7 @@
 	struct icom_adapter *cur_adapter_entry;
 	struct list_head *tmp;
 
-	icom_adapter = (struct icom_adapter *)
-	    kzalloc(sizeof(struct icom_adapter), GFP_KERNEL);
+	icom_adapter = kzalloc(sizeof(struct icom_adapter), GFP_KERNEL);
 
 	if (!icom_adapter) {
 		return -ENOMEM;