ti816x: Enable ethernet support

The ti816x SoC revision of the ethernet IP block is handled by the
"davinci_emac" driver, rather than the "cpsw" driver as done by later
members of the family.  Enable the relevant plumbing.

Signed-off-by: Sriramakrishnan <srk@ti.com>
Signed-off-by: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/net/davinci_emac.h b/drivers/net/davinci_emac.h
index 13cd68f..e2ed54b 100644
--- a/drivers/net/davinci_emac.h
+++ b/drivers/net/davinci_emac.h
@@ -40,6 +40,8 @@
 
 /* MII Status Register */
 #define MII_STATUS_REG			1
+/* PHY Configuration register */
+#define PHY_CONF_TXCLKEN		(1 << 5)
 
 /* Number of statistics registers */
 #define EMAC_NUM_STATS			36