Move compiler.h to commonlib

Its spreading copies got out of sync. And as it is not a standard header
but used in commonlib code, it belongs into commonlib. While we are at
it, always include it via GCC's `-include` switch.

Some Windows and BSD quirk handling went into the util copies. We always
guard from redefinitions now to prevent further issues.

Change-Id: I850414e6db1d799dce71ff2dc044e6a000ad2552
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/28927
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/apollolake/chip.c

@@ -20,7 +20,6 @@
 #include <arch/acpi.h>
 #include <bootstate.h>
 #include <cbmem.h>
-#include <compiler.h>
 #include <console/console.h>
 #include <cpu/cpu.h>
 #include <cpu/x86/mp.h>

src/soc/intel/apollolake/cse.c

@@ -22,7 +22,6 @@
 #include <soc/pci_devs.h>
 #include <device/pci_ops.h>
 #include <stdint.h>
-#include <compiler.h>
 
 #define PCI_ME_HFSTS1	0x40
 #define PCI_ME_HFSTS2	0x48

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

@@ -25,7 +25,6 @@
 #define _SOC_APOLLOLAKE_NVS_H_
 
 #include <commonlib/helpers.h>
-#include <compiler.h>
 #include <vendorcode/google/chromeos/gnvs.h>
 
 typedef struct global_nvs_t {

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

@@ -19,7 +19,6 @@
 #define _SOC_APOLLOLAKE_PM_H_
 
 #include <stdint.h>
-#include <compiler.h>
 #include <arch/acpi.h>
 #include <soc/gpe.h>
 #include <soc/iomap.h>

src/soc/intel/apollolake/romstage.c

@@ -24,7 +24,6 @@
 #include <bootmode.h>
 #include <cbfs.h>
 #include <cbmem.h>
-#include <compiler.h>
 #include <console/console.h>
 #include <cpu/x86/mtrr.h>
 #include <cpu/x86/pae.h>
@@ -52,7 +51,6 @@
 #include <timestamp.h>
 #include <timer.h>
 #include <delay.h>
-#include <compiler.h>
 #include "chip.h"
 
 static const uint8_t hob_variable_guid[16] = {