ixgbe: Cleanup DCB logic, whitespace, and comments in ixgbe_ethtool.c

This change address a few whitespace issues in DCB #ifdefs, adds a comment
calling out the DCB specific registers, and nests an if statement inline
with a number of if statements related to flow control.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Tested-by: NRoss Brattain <ross.b.brattain@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ixgbe/ixgbe_ethtool.c

@@ -342,13 +342,6 @@ static void ixgbe_get_pauseparam(struct net_device *netdev,
 	else
 		pause->autoneg = 1;
 
-#ifdef CONFIG_DCB
-	if (hw->fc.current_mode == ixgbe_fc_pfc) {
-		pause->rx_pause = 0;
-		pause->tx_pause = 0;
-	}
-
-#endif
 	if (hw->fc.current_mode == ixgbe_fc_rx_pause) {
 		pause->rx_pause = 1;
 	} else if (hw->fc.current_mode == ixgbe_fc_tx_pause) {
@@ -356,6 +349,11 @@ static void ixgbe_get_pauseparam(struct net_device *netdev,
 	} else if (hw->fc.current_mode == ixgbe_fc_full) {
 		pause->rx_pause = 1;
 		pause->tx_pause = 1;
+#ifdef CONFIG_DCB
+	} else if (hw->fc.current_mode == ixgbe_fc_pfc) {
+		pause->rx_pause = 0;
+		pause->tx_pause = 0;
+#endif
 	}
 }
 
@@ -373,7 +371,6 @@ static int ixgbe_set_pauseparam(struct net_device *netdev,
 		return -EINVAL;
 
 #endif
-
 	fc = hw->fc;
 
 	if (pause->autoneg != AUTONEG_ENABLE)
@@ -629,6 +626,7 @@ static void ixgbe_get_regs(struct net_device *netdev,
 	regs_buff[827] = IXGBE_READ_REG(hw, IXGBE_WUPM);
 	regs_buff[828] = IXGBE_READ_REG(hw, IXGBE_FHFT(0));
 
+	/* DCB */
 	regs_buff[829] = IXGBE_READ_REG(hw, IXGBE_RMCS);
 	regs_buff[830] = IXGBE_READ_REG(hw, IXGBE_DPMCS);
 	regs_buff[831] = IXGBE_READ_REG(hw, IXGBE_PDPMCS);