sfc: Reverse the XOFF/XON pause frame control fifo thresholds

These were clearly bogus.

From: Steve Hodgson <shodgson@solarflare.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/sfc/falcon.c

@@ -2585,8 +2585,8 @@ int falcon_init_nic(struct efx_nic *efx)
 		  rx_xoff_thresh_bytes : efx->type->rx_xoff_thresh);
 	EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XOFF_MAC_TH, thresh / 256);
 	/* RX control FIFO thresholds [32 entries] */
-	EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XON_TX_TH, 25);
-	EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XOFF_TX_TH, 20);
+	EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XON_TX_TH, 20);
+	EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XOFF_TX_TH, 25);
 	falcon_write(efx, &temp, RX_CFG_REG_KER);
 
 	/* Set destination of both TX and RX Flush events */