qca-wifi: Fixed compiler issues in tools.

Issue:
        Observed few places unused prints with zero lengths.
        Due to this format zero lenghs prints observed compiler issues.
    Solution:
        As these zero lengh prints not necessary for format hence removed.

Change-Id: I58c433e933bb5099d8c1a261bfb60a240c7994f5

tools/linux/peerstats.c

@@ -399,7 +399,6 @@ static void dp_peer_avg_rate_stats_print(uint8_t *peer_mac,
 		      avg_snr, stats->tx[type].num_snr,
 		      psr);
 	}
-	PRINT("");
 
 	PRINT("Avg rx stats: ");
 	for (type = 0; type < WLAN_RATE_MAX; type++) {
@@ -426,9 +425,6 @@ static void dp_peer_avg_rate_stats_print(uint8_t *peer_mac,
 		       avg_snr, stats->rx[type].num_snr,
 		       psr);
 	}
-	PRINT("");
-
-	PRINT("");
 }
 
 static void dp_peer_tx_link_stats_print(uint8_t *peer_mac,