[RPC]: fix sparse gfp nocast warnings

Fix nocast sparse warnings:
net/rxrpc/call.c:2013:25: warning: implicit cast to nocast type
net/rxrpc/connection.c:538:46: warning: implicit cast to nocast type
net/sunrpc/sched.c:730:36: warning: implicit cast to nocast type
net/sunrpc/sched.c:734:56: warning: implicit cast to nocast type

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/rxrpc/call.h

@@ -203,7 +203,7 @@ extern int rxrpc_call_write_data(struct rxrpc_call *call,
 				 size_t sioc,
 				 struct kvec *siov,
 				 uint8_t rxhdr_flags,
-				 int alloc_flags,
+				 unsigned int __nocast alloc_flags,
 				 int dup_data,
 				 size_t *size_sent);
 

include/rxrpc/message.h

@@ -63,7 +63,7 @@ extern int rxrpc_conn_newmsg(struct rxrpc_connection *conn,
 			     uint8_t type,
 			     int count,
 			     struct kvec *diov,
-			     int alloc_flags,
+			     unsigned int __nocast alloc_flags,
 			     struct rxrpc_message **_msg);
 
 extern int rxrpc_conn_sendmsg(struct rxrpc_connection *conn, struct rxrpc_message *msg);

net/rxrpc/call.c

@@ -1923,7 +1923,7 @@ int rxrpc_call_write_data(struct rxrpc_call *call,
 			  size_t sioc,
 			  struct kvec *siov,
 			  u8 rxhdr_flags,
-			  int alloc_flags,
+			  unsigned int __nocast alloc_flags,
 			  int dup_data,
 			  size_t *size_sent)
 {

net/rxrpc/connection.c

@@ -522,7 +522,7 @@ int rxrpc_conn_newmsg(struct rxrpc_connection *conn,
 		      uint8_t type,
 		      int dcount,
 		      struct kvec diov[],
-		      int alloc_flags,
+		      unsigned int __nocast alloc_flags,
 		      struct rxrpc_message **_msg)
 {
 	struct rxrpc_message *msg;

net/sunrpc/sched.c

@@ -719,7 +719,7 @@ static void rpc_async_schedule(void *arg)
 void *
 rpc_malloc(struct rpc_task *task, size_t size)
 {
-	int	gfp;
+	unsigned int __nocast	gfp;
 
 	if (task->tk_flags & RPC_TASK_SWAPPER)
 		gfp = GFP_ATOMIC;