net: wireless: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d063
(device-core: Ensure drvdata = NULL when no driver is bound).
Thus, it is not needed to manually clear the device driver data to NULL.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/wireless/ath/ath5k/ahb.c

@@ -185,7 +185,6 @@ static int ath_ahb_probe(struct platform_device *pdev)
 
  err_free_hw:
 	ieee80211_free_hw(hw);
-	platform_set_drvdata(pdev, NULL);
  err_iounmap:
         iounmap(mem);
  err_out:
@@ -221,7 +220,6 @@ static int ath_ahb_remove(struct platform_device *pdev)
 
 	ath5k_deinit_ah(ah);
 	iounmap(ah->iobase);
-	platform_set_drvdata(pdev, NULL);
 	ieee80211_free_hw(hw);
 
 	return 0;

drivers/net/wireless/ath/ath9k/ahb.c

@@ -150,7 +150,6 @@ static int ath_ahb_probe(struct platform_device *pdev)
 	free_irq(irq, sc);
  err_free_hw:
 	ieee80211_free_hw(hw);
-	platform_set_drvdata(pdev, NULL);
 	return ret;
 }
 
@@ -164,7 +163,6 @@ static int ath_ahb_remove(struct platform_device *pdev)
 		ath9k_deinit_device(sc);
 		free_irq(sc->irq, sc);
 		ieee80211_free_hw(sc->hw);
-		platform_set_drvdata(pdev, NULL);
 	}
 
 	return 0;