esd/atom15: import esd atom15 board

This patch adds esd atom15 board with
Intel Atom E3815 SoC.

Change-Id: I430a40ad8ab3316d34ec5567329370f69db3f15e
Signed-off-by: Michael Tasche <michael.tasche@esd.eu>
Reviewed-on: https://review.coreboot.org/12632
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/esd/Kconfig b/src/mainboard/esd/Kconfig
new file mode 100644
index 0000000..3b9eb58
--- /dev/null
+++ b/src/mainboard/esd/Kconfig
@@ -0,0 +1,16 @@
+if VENDOR_ESD
+
+choice
+	prompt "Mainboard model"
+
+source "src/mainboard/esd/*/Kconfig.name"
+
+endchoice
+
+source "src/mainboard/esd/*/Kconfig"
+
+config MAINBOARD_VENDOR
+	string
+	default "esd"
+
+endif # VENDOR_ESD