Fixed missing Definition of ETH_RX_BUF_SIZE in hal_conf.h

/* Definition of the Ethernet driver buffers size and count */
#define ETH_RX_BUF_SIZE                ETH_MAX_PACKET_SIZE /* buffer size for receive               */

Firmware/Core/Inc/stm32f7xx_hal_conf.h

@@ -209,7 +209,7 @@
 #define MAC_ADDR5   0U
 
 /* Definition of the Ethernet driver buffers size and count */
-#define ETH_RX_BUF_SIZE                 /* buffer size for receive               */
+#define ETH_RX_BUF_SIZE                ETH_MAX_PACKET_SIZE /* buffer size for receive               */
 #define ETH_TX_BUF_SIZE                ETH_MAX_PACKET_SIZE /* buffer size for transmit              */
 #define ETH_RXBUFNB                    ((uint32_t)4U)       /* 4 Rx buffers of size ETH_RX_BUF_SIZE  */
 #define ETH_TXBUFNB                    ((uint32_t)4U)       /* 4 Tx buffers of size ETH_TX_BUF_SIZE  */