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>

include/configs/iconnect.h

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
+ * Copyright (C) 2022 Tony Dinh <mibodhi@gmail.com>
  * (C) Copyright 2009-2012
  * Wojciech Dubowik <wojciech.dubowik@neratec.com>
  * Luka Perkov <luka@openwrt.org>
@@ -10,32 +11,24 @@
 
 #include "mv-common.h"
 
-/*
- * Environment variables configuration
- */
-
-/*
- * Default environment variables
- */
-
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"console=console=ttyS0,115200\0"	\
 	"mtdids=nand0=orion_nand\0"		\
-	"mtdparts="CONFIG_MTDPARTS_DEFAULT	\
+	"mtdparts=" CONFIG_MTDPARTS_DEFAULT	\
 	"kernel=/boot/uImage\0"			\
 	"bootargs_root=noinitrd ubi.mtd=2 root=ubi0:rootfs rootfstype=ubifs\0"
 
 /*
  * Ethernet driver configuration
+ *
+ * This board has PCIe Wifi card, so allow Ethernet to be disabled
  */
 #ifdef CONFIG_CMD_NET
 #define CONFIG_MVGBE_PORTS	{1, 0}	/* enable port 0 only */
 #define CONFIG_PHY_BASE_ADR	11
-#undef CONFIG_RESET_PHY_R
+#ifdef CONFIG_RESET_PHY_R
+#undef CONFIG_RESET_PHY_R	/* remove legacy reset_phy() */
+#endif
 #endif /* CONFIG_CMD_NET */
 
-/*
- * File system
- */
-
 #endif /* _CONFIG_ICONNECT_H */