Staging: gdm72xx: Remove space after cast

Fix the checkpatch warning "No space is necessary after cast"
Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gdm72xx/netlink_k.c

@@ -21,7 +21,7 @@
 #include "netlink_k.h"
 
 #if !defined(NLMSG_HDRLEN)
-#define NLMSG_HDRLEN	 ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
+#define NLMSG_HDRLEN	 ((int)NLMSG_ALIGN(sizeof(struct nlmsghdr)))
 #endif
 
 #define ND_MAX_GROUP			30