net/nfb: fix array indexes in deinit functions

[ upstream commit 8a4c8edb1154a58bad807cdc2ca947773e2ee8f1 ]

The indexes in the for cycle were wrongly used and
the code accessed outside of the rxmac/txmac array.

Fixes: 6435f9a ("net/nfb: add new netcope driver")

Signed-off-by: Martin Spinler <spinler@cesnet.cz>

drivers/net/nfb/nfb_ethdev.c

@@ -77,9 +77,10 @@ static void
 nfb_nc_rxmac_deinit(struct nc_rxmac *rxmac[RTE_MAX_NC_RXMAC],
 	uint16_t max_rxmac)
 {
-	for (; max_rxmac > 0; --max_rxmac) {
-		nc_rxmac_close(rxmac[max_rxmac]);
-		rxmac[max_rxmac] = NULL;
+	uint16_t i;
+	for (i = 0; i < max_rxmac; i++) {
+		nc_rxmac_close(rxmac[i]);
+		rxmac[i] = NULL;
 	}
 }
 
@@ -95,9 +96,10 @@ static void
 nfb_nc_txmac_deinit(struct nc_txmac *txmac[RTE_MAX_NC_TXMAC],
 	uint16_t max_txmac)
 {
-	for (; max_txmac > 0; --max_txmac) {
-		nc_txmac_close(txmac[max_txmac]);
-		txmac[max_txmac] = NULL;
+	uint16_t i;
+	for (i = 0; i < max_txmac; i++) {
+		nc_txmac_close(txmac[i]);
+		txmac[i] = NULL;
 	}
 }