mb/siemens/chili: Move mainboard/gpio.h to variant/gpio.h

Move mainboard/gpio.h to variant/gpio.h and rename its methods to make
clear that these methods are implemented on variant level.

Change-Id: Ib4e7ec948ca4d019ad82ebc5abe39fc408281cf4
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48299
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/siemens/chili/romstage.c b/src/mainboard/siemens/chili/romstage.c
index 7453fa5..06927b0 100644
--- a/src/mainboard/siemens/chili/romstage.c
+++ b/src/mainboard/siemens/chili/romstage.c
@@ -1,11 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <mainboard/gpio.h>
 #include <option.h>
 #include <soc/cnl_memcfg_init.h>
 #include <soc/gpio.h>
 #include <soc/romstage.h>
 #include <variant.h>
+#include <variant/gpio.h>
 
 void mainboard_memory_init_params(FSPM_UPD *memupd)
 {
@@ -31,7 +31,7 @@
 
 	variant_romstage_params(memupd);
 
-	mainboard_configure_gpios();
+	variant_configure_gpios();
 }
 
 __weak void variant_romstage_params(FSPM_UPD *const mupd)