kconfig: add board Kconfig and defconfig files

This commit adds:
 - arch/${ARCH}/Kconfig
    provide a menu to select target boards
 - board/${VENDOR}/${BOARD}/Kconfig or board/${BOARD}/Kconfig
    set CONFIG macros to the appropriate values for each board
 - configs/${TARGET_BOARD}_defconfig
    default setting of each board

(This commit was automatically generated by a conversion script
based on boards.cfg)

In Linux Kernel, defconfig files are located under
arch/${ARCH}/configs/ directory.
It works in Linux Kernel since ARCH is always given from the
command line for cross compile.

But in U-Boot, ARCH is not given from the command line.
Which means we cannot know ARCH until the board configuration is done.
That is why all the "*_defconfig" files should be gathered into a
single directory ./configs/.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
new file mode 100644
index 0000000..6cda7db
--- /dev/null
+++ b/arch/m68k/Kconfig
@@ -0,0 +1,98 @@
+menu "M68000 architecture"
+	depends on M68K
+
+config SYS_ARCH
+	string
+	default "m68k"
+
+choice
+	prompt "Target select"
+
+config TARGET_M52277EVB
+	bool "Support M52277EVB"
+
+config TARGET_M5235EVB
+	bool "Support M5235EVB"
+
+config TARGET_COBRA5272
+	bool "Support cobra5272"
+
+config TARGET_EB_CPU5282
+	bool "Support eb_cpu5282"
+
+config TARGET_TASREG
+	bool "Support TASREG"
+
+config TARGET_M5208EVBE
+	bool "Support M5208EVBE"
+
+config TARGET_M5249EVB
+	bool "Support M5249EVB"
+
+config TARGET_M5253DEMO
+	bool "Support M5253DEMO"
+
+config TARGET_M5253EVBE
+	bool "Support M5253EVBE"
+
+config TARGET_M5272C3
+	bool "Support M5272C3"
+
+config TARGET_M5275EVB
+	bool "Support M5275EVB"
+
+config TARGET_M5282EVB
+	bool "Support M5282EVB"
+
+config TARGET_ASTRO_MCF5373L
+	bool "Support astro_mcf5373l"
+
+config TARGET_M53017EVB
+	bool "Support M53017EVB"
+
+config TARGET_M5329EVB
+	bool "Support M5329EVB"
+
+config TARGET_M5373EVB
+	bool "Support M5373EVB"
+
+config TARGET_M54418TWR
+	bool "Support M54418TWR"
+
+config TARGET_M54451EVB
+	bool "Support M54451EVB"
+
+config TARGET_M54455EVB
+	bool "Support M54455EVB"
+
+config TARGET_M5475EVB
+	bool "Support M5475EVB"
+
+config TARGET_M5485EVB
+	bool "Support M5485EVB"
+
+endchoice
+
+source "board/BuS/eb_cpu5282/Kconfig"
+source "board/astro/mcf5373l/Kconfig"
+source "board/cobra5272/Kconfig"
+source "board/esd/tasreg/Kconfig"
+source "board/freescale/m5208evbe/Kconfig"
+source "board/freescale/m52277evb/Kconfig"
+source "board/freescale/m5235evb/Kconfig"
+source "board/freescale/m5249evb/Kconfig"
+source "board/freescale/m5253demo/Kconfig"
+source "board/freescale/m5253evbe/Kconfig"
+source "board/freescale/m5272c3/Kconfig"
+source "board/freescale/m5275evb/Kconfig"
+source "board/freescale/m5282evb/Kconfig"
+source "board/freescale/m53017evb/Kconfig"
+source "board/freescale/m5329evb/Kconfig"
+source "board/freescale/m5373evb/Kconfig"
+source "board/freescale/m54418twr/Kconfig"
+source "board/freescale/m54451evb/Kconfig"
+source "board/freescale/m54455evb/Kconfig"
+source "board/freescale/m547xevb/Kconfig"
+source "board/freescale/m548xevb/Kconfig"
+
+endmenu