staging: rtl8192u: fix indentation issue

There is a block of statements that are indented
too deeply, remove the extraneous tabs.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20191114095430.132120-1-colin.king@canonical.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r819xU_cmdpkt.c

@@ -169,6 +169,7 @@ static void cmdpkt_beacontimerinterrupt_819xusb(struct net_device *dev)
 {
 	struct r8192_priv *priv = ieee80211_priv(dev);
 	u16 tx_rate;
+
 	/* 87B have to S/W beacon for DTM encryption_cmn. */
 	if (priv->ieee80211->current_network.mode == IEEE_A ||
 	    priv->ieee80211->current_network.mode == IEEE_N_5G ||