mb/scaleway/tagada: Copy intel/harcuvar and rename

Change-Id: I6fc1f8393ce3f5ba6f52edad7cf8efa5524d2704
Signed-off-by: Julien Viard de Galbert <jviarddegalbert@online.net>
Reviewed-on: https://review.coreboot.org/23735
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/scaleway/Kconfig

@@ -0,0 +1,16 @@
+if VENDOR_SCALEWAY
+
+choice
+	prompt "Mainboard model"
+
+source "src/mainboard/scaleway/*/Kconfig.name"
+
+endchoice
+
+source "src/mainboard/scaleway/*/Kconfig"
+
+config MAINBOARD_VENDOR
+	string
+	default "Scaleway"
+
+endif # VENDOR_SCALEWAY