mb/siemens/mc_ehl: Add new mainboard based on elkhartlake_crb

Add a new mainboard called mc_ehl which is based on Intel's
'elkhartlake_crb'. This commit simply copies the mainboard directory and
adjusts the naming to match the new board's name. Follow-up commits will
introduce the needed changes for the new mainboard.

Change-Id: Ia7c0616098046d975aa698910ac81f435d7882cb
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56032
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
diff --git a/src/mainboard/siemens/mc_ehl/mainboard.c b/src/mainboard/siemens/mc_ehl/mainboard.c
new file mode 100644
index 0000000..c63beb74
--- /dev/null
+++ b/src/mainboard/siemens/mc_ehl/mainboard.c
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <baseboard/variants.h>
+#include <device/device.h>
+#include <soc/gpio.h>
+
+static void mainboard_init(void *chip_info)
+{
+	const struct pad_config *pads;
+	size_t num;
+
+	pads = variant_gpio_table(&num);
+	gpio_configure_pads(pads, num);
+}
+
+struct chip_operations mainboard_ops = {
+	.init = mainboard_init,
+};