net: fix some sparse errors

make C=2 CF="-D__CHECK_ENDIAN__" M=net

And fix flowi4_init_output() prototype for sport

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index 7e4ec9f..6e412a6 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -141,7 +141,7 @@
 __be32 root_server_addr = NONE;	/* Address of NFS server */
 u8 root_server_path[256] = { 0, };	/* Path to mount as root */
 
-u32 ic_dev_xid;		/* Device under configuration */
+__be32 ic_dev_xid;		/* Device under configuration */
 
 /* vendor class identifier */
 static char vendor_class_identifier[253] __initdata;
@@ -859,9 +859,9 @@
  */
 static void __init ic_do_bootp_ext(u8 *ext)
 {
-       u8 servers;
-       int i;
-	u16 mtu;
+	u8 servers;
+	int i;
+	__be16 mtu;
 
 #ifdef IPCONFIG_DEBUG
 	u8 *c;