ARM DaVinci: Changing function names for EMAC driver

DM644x is just one of a series of DaVinci chips that use the EMAC driver.
By replacing all the function names that start with dm644x_* to davinci_*
we make these function more portable. I have tested this change on my EVM.
DM6467 is another DaVinci SOC which uses the EMAC driver and i will
be sending patches that add DaVinci DM6467 support to the list soon.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/lib_arm/board.c b/lib_arm/board.c
index 6e3ef08..5ade882 100644
--- a/lib_arm/board.c
+++ b/lib_arm/board.c
@@ -430,9 +430,9 @@
 
 	/* Perform network card initialisation if necessary */
 #ifdef CONFIG_DRIVER_TI_EMAC
-extern void dm644x_eth_set_mac_addr (const u_int8_t *addr);
+extern void davinci_eth_set_mac_addr (const u_int8_t *addr);
 	if (getenv ("ethaddr")) {
-		dm644x_eth_set_mac_addr(gd->bd->bi_enetaddr);
+		davinci_eth_set_mac_addr(gd->bd->bi_enetaddr);
 	}
 #endif