intel/igb:fix repeated words in comments

Delete the redundant word 'frames'.
Delete the redundant word 'set'.
Delete the redundant word 'slot'.
Signed-off-by: Jilin Yuan <yuanjilin@cdjrlc.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/igb/e1000_mac.c

@@ -854,7 +854,7 @@ s32 igb_force_mac_fc(struct e1000_hw *hw)
 	 *      1:  Rx flow control is enabled (we can receive pause
 	 *          frames but not send pause frames).
 	 *      2:  Tx flow control is enabled (we can send pause frames
-	 *          frames but we do not receive pause frames).
+	 *          but we do not receive pause frames).
 	 *      3:  Both Rx and TX flow control (symmetric) is enabled.
 	 *  other:  No other values should be possible at this point.
 	 */

drivers/net/ethernet/intel/igb/igb_main.c

@@ -1945,7 +1945,7 @@ static void igb_setup_tx_mode(struct igb_adapter *adapter)
 		 * However, when we do so, no frame from queue 2 and 3 are
 		 * transmitted.  It seems the MAX_TPKT_SIZE should not be great
 		 * or _equal_ to the buffer size programmed in TXPBS. For this
-		 * reason, we set set MAX_ TPKT_SIZE to (4kB - 1) / 64.
+		 * reason, we set MAX_ TPKT_SIZE to (4kB - 1) / 64.
 		 */
 		val = (4096 - 1) / 64;
 		wr32(E1000_I210_DTXMXPKTSZ, val);
@@ -9522,7 +9522,7 @@ static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev,
 		igb_down(adapter);
 	pci_disable_device(pdev);
 
-	/* Request a slot slot reset. */
+	/* Request a slot reset. */
 	return PCI_ERS_RESULT_NEED_RESET;
 }