treewide: Simply conditions with the new OF_REAL

Use this new Kconfig to simplify the compilation conditions where
appropriate.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 31516e1..ed94d51 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -489,7 +489,7 @@
 		return ret;
 	}
 #endif
-	if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
+	if (CONFIG_IS_ENABLED(OF_REAL)) {
 		ret = fdtdec_setup();
 		if (ret) {
 			debug("fdtdec_setup() returned error %d\n", ret);
diff --git a/common/spl/spl_spi.c b/common/spl/spl_spi.c
index f92ce37..46ee405 100644
--- a/common/spl/spl_spi.c
+++ b/common/spl/spl_spi.c
@@ -102,10 +102,10 @@
 
 	header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
 
-#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
-	payload_offs = ofnode_conf_read_int("u-boot,spl-payload-offset",
-					    payload_offs);
-#endif
+	if (CONFIG_IS_ENABLED(OF_REAL)) {
+		payload_offs = ofnode_conf_read_int("u-boot,spl-payload-offset",
+						    payload_offs);
+	}
 
 #ifdef CONFIG_SPL_OS_BOOT
 	if (spl_start_uboot() || spi_load_image_os(spl_image, flash, header))