drivers/atm/nicstar.c: fix some sparse warnings

Index: linux-2.6.11-bk4-sparse/drivers/atm/nicstar.c
===================================================================
@@ -350,7 +350,7 @@ static void __devexit nicstar_remove_one
    kfree(card->rsq.org);
    kfree(card->tsq.org);
    free_irq(card->pcidev->irq, card);
-   iounmap((void *) card->membase);
+   iounmap(card->membase);
    kfree(card);
 }
 

@@ -976,7 +976,7 @@ static void __devinit ns_init_card_error
    }
    if (error >= 4)
    {
-      iounmap((void *) card->membase);
+      iounmap(card->membase);
    }
    if (error >= 3)
    {

Index: linux-2.6.11-bk4-sparse/drivers/atm/nicstar.h
===================================================================
@@ -739,8 +739,8 @@ typedef struct skb_pool
 
 typedef struct vc_map
 {
-   volatile int tx:1;				/* TX vc? */
-   volatile int rx:1;				/* RX vc? */
+   volatile unsigned int tx:1;				/* TX vc? */
+   volatile unsigned int rx:1;				/* RX vc? */
    struct atm_vcc *tx_vcc, *rx_vcc;
    struct sk_buff *rx_iov;		/* RX iovector skb */
    scq_info *scq;			/* To keep track of the SCQ */