kirkwood: kconfig: refactor Kconfig and defconfig

Becuase the board select menu in arch/arm/Kconfig is too big,
move the KirkWood board select menu to kirkwood/Kconfig.

Consolidate also common settings (CONFIG_SYS_CPU="arm926ejs" and
CONFIG_SYS_SOC="kirkwood").

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Prafulla Wadasdkar <prafulla@marvell.com>
Cc: Luka Perkov <luka@openwrt.org>
diff --git a/arch/arm/cpu/arm926ejs/kirkwood/Kconfig b/arch/arm/cpu/arm926ejs/kirkwood/Kconfig
new file mode 100644
index 0000000..58867f3
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/kirkwood/Kconfig
@@ -0,0 +1,89 @@
+if KIRKWOOD
+
+choice
+	prompt "Marvell Kirkwood board select"
+
+config TARGET_OPENRD
+	bool "Marvell OpenRD Board"
+
+config TARGET_MV88F6281GTW_GE
+	bool "MV88f6281GTW_GE Board"
+
+config TARGET_RD6281A
+	bool "RD6281A Board"
+
+config TARGET_DREAMPLUG
+	bool "DreamPlug Board"
+
+config TARGET_GURUPLUG
+	bool "GuruPlug Board"
+
+config TARGET_SHEEVAPLUG
+	bool "SheevaPlug Board"
+
+config TARGET_LSXL
+	bool "lsxl Board"
+
+config TARGET_POGO_E02
+	bool "pogo_e02 Board"
+
+config TARGET_DNS325
+	bool "dns325 Board"
+
+config TARGET_ICONNECT
+	bool "iconnect Board"
+
+config TARGET_TK71
+	bool "TK71 Board"
+
+config TARGET_KM_KIRKWOOD
+	bool "KM_KIRKWOOD Board"
+
+config TARGET_NET2BIG_V2
+	bool "LaCie 2Big Network v2 NAS Board"
+
+config TARGET_NETSPACE_V2
+	bool "LaCie netspace_v2 Board"
+
+config TARGET_WIRELESS_SPACE
+	bool "LaCie Wireless_space Board"
+
+config TARGET_IB62X0
+	bool "ib62x0 Board"
+
+config TARGET_DOCKSTAR
+	bool "Dockstar Board"
+
+config TARGET_GOFLEXHOME
+	bool "GoFlex Home Board"
+
+endchoice
+
+config SYS_CPU
+	string
+	default "arm926ejs"
+
+config SYS_SOC
+	string
+	default "kirkwood"
+
+source "board/Marvell/openrd/Kconfig"
+source "board/Marvell/mv88f6281gtw_ge/Kconfig"
+source "board/Marvell/rd6281a/Kconfig"
+source "board/Marvell/dreamplug/Kconfig"
+source "board/Marvell/guruplug/Kconfig"
+source "board/Marvell/sheevaplug/Kconfig"
+source "board/buffalo/lsxl/Kconfig"
+source "board/cloudengines/pogo_e02/Kconfig"
+source "board/d-link/dns325/Kconfig"
+source "board/iomega/iconnect/Kconfig"
+source "board/karo/tk71/Kconfig"
+source "board/keymile/km_arm/Kconfig"
+source "board/LaCie/net2big_v2/Kconfig"
+source "board/LaCie/netspace_v2/Kconfig"
+source "board/LaCie/wireless_space/Kconfig"
+source "board/raidsonic/ib62x0/Kconfig"
+source "board/Seagate/dockstar/Kconfig"
+source "board/Seagate/goflexhome/Kconfig"
+
+endif