ixgbe: fix poll loop for FDIRCTRL.INIT_DONE bit

The loop in ixgbe_reinit_fdir_tables_82599() only polls for up to 100us
resulting in failures to update the FDIR filter table at 1Gbps and 10Gbps
when under load.

The poll times for FDIRCTRL.INIT_DONE are 55us, 550us and 5.5ms for 10Gbps,
1Gbps and 100Mbps respectively.

This patch sets the wait time to be the same as in ixgbe_fdir_enable_82599()
Reported-by: Bhushan <shashi-sm@users.sf.net>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c

@@ -1099,7 +1099,7 @@ s32 ixgbe_reinit_fdir_tables_82599(struct ixgbe_hw *hw)
 		if (IXGBE_READ_REG(hw, IXGBE_FDIRCTRL) &
 		                   IXGBE_FDIRCTRL_INIT_DONE)
 			break;
-		udelay(10);
+		usleep_range(1000, 2000);
 	}
 	if (i >= IXGBE_FDIR_INIT_DONE_POLL) {
 		hw_dbg(hw, "Flow Director Signature poll time exceeded!\n");