ppc4xx: Change 4xx ethernet driver to handle cached memory too

This patch enables the 4xx EMAC driver to work too, when dcache is
enabled.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/ppc4xx_enet.h b/include/ppc4xx_enet.h
index 76c1d12..f285500 100644
--- a/include/ppc4xx_enet.h
+++ b/include/ppc4xx_enet.h
@@ -102,6 +102,8 @@
     uint32_t		emac_ier;
     volatile mal_desc_t *tx;
     volatile mal_desc_t *rx;
+    u32			tx_phys;
+    u32			rx_phys;
     bd_t		*bis;	/* for eth_init upon mal error */
     mal_desc_t		*alloc_tx_buf;
     mal_desc_t		*alloc_rx_buf;