arm: kirkwood: iConnect : Add Ethernet support

- Currently, CONFIG_RESET_PHY_R symbol is used in
arch/arm/mach-kirkwood/include/mach/config.h for all Kirkwood
boards with mv8831116 PHY, with each board defines the function
reset_phy(). Undefine it for this board.
- Add board_eth_init(), CONFIG_DM_ETH, and CONFIG_PHY_MARVELL
to bring up Ethernet.
- Miscellaneous changes: Move constants to .c file and remove header file
board/iomega/iconnect/iconnect.h. Add CONFIG_HUSH_PARSER, use BIT macro,
and cleanup comments.

Signed-off-by: Tony Dinh <mibodhi@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>

configs/iconnect_defconfig

@@ -20,7 +20,8 @@ CONFIG_BOOTCOMMAND="setenv bootargs ${console} ${mtdparts} ${bootargs_root}; ubi
 CONFIG_USE_PREBOOT=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_BOARD_LATE_INIT=y
-CONFIG_SYS_PROMPT="iconnect => "
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="iConnect> "
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_NAND=y
 CONFIG_CMD_PCI=y
@@ -39,11 +40,14 @@ CONFIG_OF_CONTROL=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_NAND=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_NETCONSOLE=y
 CONFIG_DM=y
 # CONFIG_MMC is not set
 CONFIG_MTD=y
 CONFIG_MTD_RAW_NAND=y
+CONFIG_PHY_MARVELL=y
+CONFIG_DM_ETH=y
 CONFIG_MVGBE=y
 CONFIG_MII=y
 CONFIG_PCI=y