buildsystem: Promote rules.h to default include

Does not fix 3rdparty/, *.S or *.ld or yet.

Change-Id: I66b48013dd89540b35ab219d2b64bc13f5f19cda
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/17656
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/soc/intel/apollolake/include/soc/pci_devs.h

@@ -16,7 +16,6 @@
 #define _SOC_APOLLOLAKE_PCI_DEVS_H_
 
 #include <device/pci_def.h>
-#include <rules.h>
 
 #define _SA_DEVFN(slot)		PCI_DEVFN(SA_DEV_SLOT_ ## slot, 0)
 #define _PCH_DEVFN(slot, func)	PCI_DEVFN(PCH_DEV_SLOT_ ## slot, func)

src/soc/intel/apollolake/pmutil.c

@@ -29,7 +29,6 @@
 #include <intelblocks/pmclib.h>
 #include <intelblocks/rtc.h>
 #include <intelblocks/tco.h>
-#include <rules.h>
 #include <soc/iomap.h>
 #include <soc/cpu.h>
 #include <soc/pci_devs.h>