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: Bogdan Purcareata <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

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

···
 		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: