arch/x86: Replace some __SMM__ guards

We generally do not guard source in attempts to reduce
the final object sizes, but rely on garbage collection.

Most of the __unused attributes inserted here will be
removed when remaining __SIMPLE_DEVICE__ guards can
be removed.

Change-Id: I2440931fab4f41d7e8249c082e6c9b5a9cd0ef13
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36641
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/bd82x6x/pch.c b/src/southbridge/intel/bd82x6x/pch.c
index de7fc36..3cd39a6 100644
--- a/src/southbridge/intel/bd82x6x/pch.c
+++ b/src/southbridge/intel/bd82x6x/pch.c
@@ -17,12 +17,9 @@
 
 #include <console/console.h>
 #include <delay.h>
-#ifdef __SMM__
-#include <device/pci_def.h>
-#else /* !__SMM__ */
 #include <device/device.h>
 #include <device/pci.h>
-#endif
+#include <device/pci_def.h>
 #include <device/pci_ops.h>
 #include <string.h>
 
@@ -145,7 +142,7 @@
 		return;
 }
 
-#ifndef __SMM__
+#ifndef __SIMPLE_DEVICE__
 /* Set bit in function disable register to hide this device */
 static void pch_hide_devfn(unsigned int devfn)
 {