net: wan: farsync: use new tasklet API

This converts the driver to use the new tasklet API introduced in
commit 12cc923f ("tasklet: Introduce new initialization API")

The new API changes the argument passed to callback functions,
but fortunately it is unused so it is straight forward to use
DECLARE_TASKLET rather than DECLARE_TASLKLET_OLD.
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Link: https://lore.kernel.org/r/20210204173947.92884-1-kernel@esmil.dkSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/wan/farsync.c

@@ -566,11 +566,11 @@ MODULE_DEVICE_TABLE(pci, fst_pci_dev_id);
 
 static void do_bottom_half_tx(struct fst_card_info *card);
 static void do_bottom_half_rx(struct fst_card_info *card);
-static void fst_process_tx_work_q(unsigned long work_q);
-static void fst_process_int_work_q(unsigned long work_q);
+static void fst_process_tx_work_q(struct tasklet_struct *unused);
+static void fst_process_int_work_q(struct tasklet_struct *unused);
 
-static DECLARE_TASKLET_OLD(fst_tx_task, fst_process_tx_work_q);
-static DECLARE_TASKLET_OLD(fst_int_task, fst_process_int_work_q);
+static DECLARE_TASKLET(fst_tx_task, fst_process_tx_work_q);
+static DECLARE_TASKLET(fst_int_task, fst_process_int_work_q);
 
 static struct fst_card_info *fst_card_array[FST_MAX_CARDS];
 static spinlock_t fst_work_q_lock;
@@ -600,7 +600,7 @@ fst_q_work_item(u64 * queue, int card_index)
 }
 
 static void
-fst_process_tx_work_q(unsigned long /*void **/work_q)
+fst_process_tx_work_q(struct tasklet_struct *unused)
 {
 	unsigned long flags;
 	u64 work_txq;
@@ -630,7 +630,7 @@ fst_process_tx_work_q(unsigned long /*void **/work_q)
 }
 
 static void
-fst_process_int_work_q(unsigned long /*void **/work_q)
+fst_process_int_work_q(struct tasklet_struct *unused)
 {
 	unsigned long flags;
 	u64 work_intq;