treewide: Try to avoid the preprocessor with OF_REAL

Convert some of these occurences to C code, where it is easy to do. This
should help encourage this approach to be used in new code.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/intel_common/p2sb.c b/arch/x86/cpu/intel_common/p2sb.c
index 5dc8163..5a7b30d 100644
--- a/arch/x86/cpu/intel_common/p2sb.c
+++ b/arch/x86/cpu/intel_common/p2sb.c
@@ -159,16 +159,16 @@
 
 static int p2sb_child_post_bind(struct udevice *dev)
 {
-#if CONFIG_IS_ENABLED(OF_REAL)
-	struct p2sb_child_plat *pplat = dev_get_parent_plat(dev);
-	int ret;
-	u32 pid;
+	if (CONFIG_IS_ENABLED(OF_REAL)) {
+		struct p2sb_child_plat *pplat = dev_get_parent_plat(dev);
+		int ret;
+		u32 pid;
 
-	ret = dev_read_u32(dev, "intel,p2sb-port-id", &pid);
-	if (ret)
-		return ret;
-	pplat->pid = pid;
-#endif
+		ret = dev_read_u32(dev, "intel,p2sb-port-id", &pid);
+		if (ret)
+			return ret;
+		pplat->pid = pid;
+	}
 
 	return 0;
 }