mv643xx_eth: make eth_port_uc_addr_{get,set}() calls symmetric

There is no good reason for the asymmetry in the parameters of
eth_port_uc_addr_get() and eth_port_uc_addr_set().  Make them
symmetric.  Remove some gratuitous block comments while we're here.

Signed-off-by: Gabriel Paubert <paubert@iram.es>
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/mv643xx_eth.h

@@ -346,10 +346,6 @@ static void eth_port_init(struct mv643xx_private *mp);
 static void eth_port_reset(unsigned int eth_port_num);
 static void eth_port_start(struct net_device *dev);
 
-/* Port MAC address routines */
-static void eth_port_uc_addr_set(unsigned int eth_port_num,
-				 unsigned char *p_addr);
-
 /* PHY and MIB routines */
 static void ethernet_phy_reset(unsigned int eth_port_num);