Convert CS8900 Ethernet driver to CONFIG_NET_MULTI API

All in-tree boards that use this controller have CONFIG_NET_MULTI added
Also:
  - changed CONFIG_DRIVER_CS8900 to CONFIG_CS8900
  - changed CS8900_BASE to CONFIG_CS8900_BASE
  - changed CS8900_BUS?? to CONFIG_CS8900_BUS??
  - cleaned up line lengths
  - modified VCMA9 command function that accesses the device
  - removed MAC address initialization from lib_arm/board.c

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Tested-by: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/netdev.h b/include/netdev.h
index 50329a3..a50ec67 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -43,6 +43,7 @@
 /* Driver initialization prototypes */
 int au1x00_enet_initialize(bd_t*);
 int bfin_EMAC_initialize(bd_t *bis);
+int cs8900_initialize(u8 dev_num, int base_addr);
 int dc21x4x_initialize(bd_t *bis);
 int davinci_emac_initialize(void);
 int dnet_eth_initialize(int id, void *regs, unsigned int phy_addr);