board: 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/board/variscite/common/imx9_eeprom.c b/board/variscite/common/imx9_eeprom.c
index 32551af..bfa30ad 100644
--- a/board/variscite/common/imx9_eeprom.c
+++ b/board/variscite/common/imx9_eeprom.c
@@ -83,7 +83,7 @@
 
 void var_eeprom_print_prod_info(struct var_eeprom *ep)
 {
-	if (IS_ENABLED(CONFIG_SPL_BUILD))
+	if (IS_ENABLED(CONFIG_XPL_BUILD))
 		return;
 
 	flush_dcache_all();
diff --git a/board/variscite/dart_6ul/Makefile b/board/variscite/dart_6ul/Makefile
index 48aa361..39c3f53 100644
--- a/board/variscite/dart_6ul/Makefile
+++ b/board/variscite/dart_6ul/Makefile
@@ -1,4 +1,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 
 obj-y  := dart_6ul.o
-obj-$(CONFIG_SPL_BUILD) += spl.o
+obj-$(CONFIG_XPL_BUILD) += spl.o
diff --git a/board/variscite/imx8mn_var_som/Makefile b/board/variscite/imx8mn_var_som/Makefile
index a8b6a34..36d9c36 100644
--- a/board/variscite/imx8mn_var_som/Makefile
+++ b/board/variscite/imx8mn_var_som/Makefile
@@ -6,7 +6,7 @@
 
 obj-y += imx8mn_var_som.o
 
-ifdef CONFIG_SPL_BUILD
+ifdef CONFIG_XPL_BUILD
 obj-y += spl.o
 obj-y += ddr4_timing.o
 endif
diff --git a/board/variscite/imx8mn_var_som/imx8mn_var_som.c b/board/variscite/imx8mn_var_som/imx8mn_var_som.c
index 532d8d6..80c84e6 100644
--- a/board/variscite/imx8mn_var_som/imx8mn_var_som.c
+++ b/board/variscite/imx8mn_var_som/imx8mn_var_som.c
@@ -54,7 +54,7 @@
 	return devno;
 }
 
-#if !defined(CONFIG_SPL_BUILD)
+#if !defined(CONFIG_XPL_BUILD)
 
 #if defined(CONFIG_DISPLAY_BOARDINFO)
 
@@ -227,4 +227,4 @@
 }
 #endif /* CONFIG_OF_BOARD_SETUP */
 
-#endif /* CONFIG_SPL_BUILD */
+#endif /* CONFIG_XPL_BUILD */
diff --git a/board/variscite/imx93_var_som/Makefile b/board/variscite/imx93_var_som/Makefile
index b638839..8b160f1 100644
--- a/board/variscite/imx93_var_som/Makefile
+++ b/board/variscite/imx93_var_som/Makefile
@@ -8,7 +8,7 @@
 obj-y += imx93_var_som.o
 obj-$(CONFIG_TARGET_IMX93_VAR_SOM) += ../common/imx9_eeprom.o
 
-ifdef CONFIG_SPL_BUILD
+ifdef CONFIG_XPL_BUILD
 obj-y += spl.o
 obj-$(CONFIG_TARGET_IMX93_VAR_SOM) += lpddr4x_timing.o
 else