x86: Move acpi_s3.h to include/acpi/

This header relates to ACPI and we are about to add some more ACPI
headers. Move this one into a new directory so they are together.

The header inclusion in pci_rom.c is not specific to x86 anymore, so drop
the #ifdef CONFIG_X86.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/pci/pci_rom.c b/drivers/pci/pci_rom.c
index 90f224b..6b17f18 100644
--- a/drivers/pci/pci_rom.c
+++ b/drivers/pci/pci_rom.c
@@ -33,12 +33,10 @@
 #include <vbe.h>
 #include <video.h>
 #include <video_fb.h>
+#include <acpi/acpi_s3.h>
 #include <linux/screen_info.h>
 
-#ifdef CONFIG_X86
-#include <acpi_s3.h>
 DECLARE_GLOBAL_DATA_PTR;
-#endif
 
 __weak bool board_should_run_oprom(struct udevice *dev)
 {