global: Use CONFIG_XPL_BUILD instead of CONFIG_SPL_BUILD

Complete this rename for all directories outside arch/ board/ drivers/
and include/

Use the new symbol to refer to any 'SPL' build, including TPL and VPL

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/boot/Makefile b/boot/Makefile
index 40e2337..5bf07e8 100644
--- a/boot/Makefile
+++ b/boot/Makefile
@@ -3,7 +3,7 @@
 # (C) Copyright 2004-2006
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
-ifndef CONFIG_SPL_BUILD
+ifndef CONFIG_XPL_BUILD
 
 obj-$(CONFIG_BOOT_RETRY) += bootretry.o
 obj-$(CONFIG_CMD_BOOTM) += bootm.o bootm_os.o
diff --git a/boot/image-android-dt.c b/boot/image-android-dt.c
index 3b25018..653835c 100644
--- a/boot/image-android-dt.c
+++ b/boot/image-android-dt.c
@@ -72,7 +72,7 @@
 	return true;
 }
 
-#if !defined(CONFIG_SPL_BUILD)
+#if !defined(CONFIG_XPL_BUILD)
 static void android_dt_print_fdt_info(const struct fdt_header *fdt)
 {
 	u32 fdt_size;
diff --git a/boot/image-android.c b/boot/image-android.c
index 774565f..fdfff58 100644
--- a/boot/image-android.c
+++ b/boot/image-android.c
@@ -652,7 +652,7 @@
 	return false;
 }
 
-#if !defined(CONFIG_SPL_BUILD)
+#if !defined(CONFIG_XPL_BUILD)
 /**
  * android_print_contents - prints out the contents of the Android format image
  * @hdr: pointer to the Android format image header
diff --git a/boot/image-fit-sig.c b/boot/image-fit-sig.c
index fe328df..35873b1 100644
--- a/boot/image-fit-sig.c
+++ b/boot/image-fit-sig.c
@@ -48,7 +48,7 @@
 	 * Use malloc() except in SPL (to save code size). In SPL the caller
 	 * must allocate the array.
 	 */
-	if (!IS_ENABLED(CONFIG_SPL_BUILD) && !region)
+	if (!IS_ENABLED(CONFIG_XPL_BUILD) && !region)
 		region = calloc(sizeof(*region), count);
 	if (!region)
 		return NULL;