mb/siemens/mc_apl1/variants/mc_apl2/mainboard.c: Clean includes

Change-Id: I14ec7d6faa20542707a1b6041e1ce358ce4a537a
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50204
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c

@@ -1,14 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <bootstate.h>
 #include <device/pci_def.h>
 #include <device/pci_ids.h>
 #include <device/pci_ops.h>
-#include <hwilib.h>
-#include <intelblocks/lpc_lib.h>
+#include <device/device.h>
 #include <baseboard/variants.h>
-#include <soc/pci_devs.h>
-#include <types.h>
 
 void variant_mainboard_final(void)
 {