Fix inconsistent definition for dmaRX_TX_BUFFER_SIZE for Xilinx ports

Author: tony-josi-aws

source/portable/NetworkInterface/Zynq/x_emacpsif_dma.c

@@ -89,7 +89,7 @@
 #endif
 #define TX_OFFSET               ipconfigPACKET_FILLER_SIZE
 
-#define dmaRX_TX_BUFFER_SIZE    1536
+#define dmaRX_TX_BUFFER_SIZE    ( 1536 -  ipBUFFER_PADDING )
 
 /* Defined in NetworkInterface.c */
 extern TaskHandle_t xEMACTaskHandles[ XPAR_XEMACPS_NUM_INSTANCES ];

source/portable/NetworkInterface/xilinx_ultrascale/x_emacpsif_dma.c

@@ -68,9 +68,9 @@
 #endif /* ( ipconfigNETWORK_MTU > 1526 ) */
 
 #if ( USE_JUMBO_FRAMES == 1 )
-    #define dmaRX_TX_BUFFER_SIZE    10240
+    #define dmaRX_TX_BUFFER_SIZE    ( 10240 - ipBUFFER_PADDING )
 #else
-    #define dmaRX_TX_BUFFER_SIZE    1536
+    #define dmaRX_TX_BUFFER_SIZE    ( 1536 -  ipBUFFER_PADDING )
 #endif /* ( USE_JUMBO_FRAMES == 1 ) */
 
 extern XScuGic xInterruptController;