staging: rtl8821ae: Fixes unnecessary return warning.

This patch fixes "void function return statements are not generally
useful" checkpatch.pl warning in base.c
Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com>
Acked-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8821ae/base.c

@@ -542,8 +542,6 @@ static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
 		return;
 	else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 		tcb_desc->use_shortpreamble = true;
-
-	return;
 }
 
 static void _rtl_query_shortgi(struct ieee80211_hw *hw,