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/technexion/pico-imx6/spl.c b/board/technexion/pico-imx6/spl.c
index 50f5177..700abb7 100644
--- a/board/technexion/pico-imx6/spl.c
+++ b/board/technexion/pico-imx6/spl.c
@@ -24,7 +24,7 @@
 #include <asm/arch/sys_proto.h>
 #include <spl.h>
 
-#if defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_XPL_BUILD)
 #include <asm/arch/mx6-ddr.h>
 
 #define IMX6DQ_DRIVE_STRENGTH		0x30
diff --git a/board/technexion/pico-imx6ul/spl.c b/board/technexion/pico-imx6ul/spl.c
index 67484e6..5b91868 100644
--- a/board/technexion/pico-imx6ul/spl.c
+++ b/board/technexion/pico-imx6ul/spl.c
@@ -18,7 +18,7 @@
 #include <linux/libfdt.h>
 #include <spl.h>
 
-#if defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_XPL_BUILD)
 
 #ifdef CONFIG_SPL_OS_BOOT
 int spl_start_uboot(void)
diff --git a/board/technexion/pico-imx7d/spl.c b/board/technexion/pico-imx7d/spl.c
index 8f219f7..cb60d3b 100644
--- a/board/technexion/pico-imx7d/spl.c
+++ b/board/technexion/pico-imx7d/spl.c
@@ -21,7 +21,7 @@
 #include <fsl_esdhc_imx.h>
 #include <spl.h>
 
-#if defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_XPL_BUILD)
 
 #ifdef CONFIG_SPL_OS_BOOT
 int spl_start_uboot(void)
diff --git a/board/technexion/pico-imx8mq/Makefile b/board/technexion/pico-imx8mq/Makefile
index 7cfe1e0..da3073c 100644
--- a/board/technexion/pico-imx8mq/Makefile
+++ b/board/technexion/pico-imx8mq/Makefile
@@ -6,7 +6,7 @@
 
 obj-y += pico-imx8mq.o
 
-ifdef CONFIG_SPL_BUILD
+ifdef CONFIG_XPL_BUILD
 obj-y += spl.o
 obj-$(CONFIG_IMX8M_LPDDR4) += lpddr4_timing_1gb.o lpddr4_timing_2gb.o lpddr4_timing_3gb.o lpddr4_timing_4gb.o
 endif