sky2: Replace mdelay with msleep in sky2_vpd_wait

sky2_vpd_wait is not called in an interrupt handler nor holding a spinlock.
The function mdelay in it can be replaced with msleep, to reduce busy wait.
Signed-off-by: NJia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/sky2.c

@@ -4287,7 +4287,7 @@ static int sky2_vpd_wait(const struct sky2_hw *hw, int cap, u16 busy)
 			dev_err(&hw->pdev->dev, "VPD cycle timed out\n");
 			return -ETIMEDOUT;
 		}
-		mdelay(1);
+		msleep(1);
 	}
 
 	return 0;