arm: mvebu: Move Armada XP/38x Kconfig to mach specific Kconfig file

Introduce a mach-mvebu/Kconfig for all Armada based SoC's.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
new file mode 100644
index 0000000..1aa9640
--- /dev/null
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -0,0 +1,21 @@
+if ARCH_MVEBU
+
+choice
+	prompt "Marvell MVEBU (Armada XP/38x) board select"
+	optional
+
+config TARGET_DB_88F6820_GP
+	bool "Support DB-88F6820-GP"
+
+config TARGET_DB_MV784MP_GP
+	bool "Support db-mv784mp-gp"
+
+config TARGET_MAXBCM
+	bool "Support maxbcm"
+
+endchoice
+
+config SYS_SOC
+	default "mvebu"
+
+endif