drivers: Use CONFIG_XPL_BUILD instead of CONFIG_SPL_BUILD

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/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 0545c23..1b65c6f 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -414,7 +414,7 @@
 {
 	struct nand_chip *chip = mtd_to_nand(mtd);
 	int ret = 0;
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 	int res;
 #endif
 
@@ -434,7 +434,7 @@
 		nand_release_device(mtd);
 	}
 
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 	/* Mark block bad in BBT */
 	if (chip->bbt) {
 		res = nand_markbad_bbt(mtd, ofs);
@@ -488,7 +488,7 @@
 	if (!chip->bbt)
 		return 0;
 	/* Return info from the table */
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 	return nand_isreserved_bbt(mtd, ofs);
 #else
 	return 0;
@@ -518,7 +518,7 @@
 		return chip->block_bad(mtd, ofs);
 
 	/* Return info from the table */
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 	return nand_isbad_bbt(mtd, ofs, allowbbt);
 #else
 	return 0;
@@ -3729,7 +3729,7 @@
 	if (!chip->read_buf || chip->read_buf == nand_read_buf)
 		chip->read_buf = busw ? nand_read_buf16 : nand_read_buf;
 
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 	if (!chip->scan_bbt)
 		chip->scan_bbt = nand_default_bbt;
 #endif