ixgbe: cleanup short msleep's (<20ms) to use usleep_range

Since msleep might not sleep for the desired amount when less
than 20ms use usleep_range.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ixgbe/ixgbe_phy.c b/drivers/net/ixgbe/ixgbe_phy.c
index df5b8aa..31cc29e 100644
--- a/drivers/net/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ixgbe/ixgbe_phy.c
@@ -753,7 +753,7 @@
 		                     &phy_data);
 		if ((phy_data & MDIO_CTRL1_RESET) == 0)
 			break;
-		msleep(10);
+		usleep_range(10000, 20000);
 	}
 
 	if ((phy_data & MDIO_CTRL1_RESET) != 0) {
@@ -782,7 +782,7 @@
 		case IXGBE_DELAY_NL:
 			data_offset++;
 			hw_dbg(hw, "DELAY: %d MS\n", edata);
-			msleep(edata);
+			usleep_range(edata * 1000, edata * 2000);
 			break;
 		case IXGBE_DATA_NL:
 			hw_dbg(hw, "DATA:\n");