ath10k: fix use of multiple blank lines

Fixes checkpatch warnings:

CHECK: Please don't use multiple blank lines

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/htc.h

@@ -214,7 +214,6 @@ struct ath10k_htc_frame {
 	struct ath10k_htc_record trailer[0];
 } __packed __aligned(4);
 
-
 /*******************/
 /* Host-side stuff */
 /*******************/