tc35815: Fix build error if NAPI enabled

This driver contains experimental NAPI code disabled by default.
The commit bea3348e ("[NET]: Make NAPI polling independent of struct
net_device objects.") converted the NAPI path of this driver but that
conversion was not complete.  This patch fixes a build error
introduced by the commit.
Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/tc35815.c

@@ -1908,7 +1908,7 @@ static int tc35815_poll(struct napi_struct *napi, int budget)
 	do {
 		tc_writel(status, &tr->Int_Src);	/* write to clear */
 
-		handled = tc35815_do_interrupt(dev, status, limit);
+		handled = tc35815_do_interrupt(dev, status, budget - received);
 		if (handled >= 0) {
 			received += handled;
 			if (received >= budget)