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/common/hash.c b/common/hash.c
index ac63803..db6925d 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -403,7 +403,7 @@
 	return 0;
 }
 
-#if !defined(CONFIG_SPL_BUILD) && (defined(CONFIG_CMD_HASH) || \
+#if !defined(CONFIG_XPL_BUILD) && (defined(CONFIG_CMD_HASH) || \
 	defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32)) || \
 	defined(CONFIG_CMD_MD5SUM)
 /**