xilinx: Fix compiler warning

The time comparsion functions require arguments of type unsigned long
instead of (signed) long.
Signed-off-by: NManuel Schölling <manuel.schoelling@gmx.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/xilinx/ll_temac_main.c

@@ -72,7 +72,7 @@ void temac_iow(struct temac_local *lp, int offset, u32 value)
 
 int temac_indirect_busywait(struct temac_local *lp)
 {
-	long end = jiffies + 2;
+	unsigned long end = jiffies + 2;
 
 	while (!(temac_ior(lp, XTE_RDY0_OFFSET) & XTE_RDY0_HARD_ACS_RDY_MASK)) {
 		if (time_before_eq(end, jiffies)) {

drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c

@@ -19,7 +19,7 @@
 /* Wait till MDIO interface is ready to accept a new transaction.*/
 int axienet_mdio_wait_until_ready(struct axienet_local *lp)
 {
-	long end = jiffies + 2;
+	unsigned long end = jiffies + 2;
 	while (!(axienet_ior(lp, XAE_MDIO_MCR_OFFSET) &
 		 XAE_MDIO_MCR_READY_MASK)) {
 		if (time_before_eq(end, jiffies)) {

drivers/net/ethernet/xilinx/xilinx_emaclite.c

@@ -695,7 +695,7 @@ static irqreturn_t xemaclite_interrupt(int irq, void *dev_id)
 
 static int xemaclite_mdio_wait(struct net_local *lp)
 {
-	long end = jiffies + 2;
+	unsigned long end = jiffies + 2;
 
 	/* wait for the MDIO interface to not be busy or timeout
 	   after some time.