staging: fsl-dpaa2/eth: Don't account SWA in tx_data_offset

When configuring the Tx buffer layout, the software annotation size is
mentioned, and MC accounts for it when configuring the frame
tx_data_offset. No need to handle it in the driver as well.

This results in 64B less memory allocated per frame.
Signed-off-by: NBogdan Purcareata <bogdan.purcareata@nxp.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c

@@ -1872,9 +1872,6 @@ static int setup_dpni(struct fsl_mc_device *ls_dev)
 		dev_warn(dev, "Tx data offset (%d) not a multiple of 64B\n",
 			 priv->tx_data_offset);
 
-	/* Accommodate software annotation space (SWA) */
-	priv->tx_data_offset += DPAA2_ETH_SWA_SIZE;
-
 	return 0;
 
 close: