arch: 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/arch/arm/mach-imx/mx6/soc.c b/arch/arm/mach-imx/mx6/soc.c
index 2c0c77e..9b40fe9 100644
--- a/arch/arm/mach-imx/mx6/soc.c
+++ b/arch/arm/mach-imx/mx6/soc.c
@@ -37,7 +37,7 @@
 	u32	fpga_rev;
 };
 
-#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_IMX_THERMAL)
+#if !defined(CONFIG_XPL_BUILD) && defined(CONFIG_IMX_THERMAL)
 static const struct imx_thermal_plat imx6_thermal_plat = {
 	.regs = (void *)ANATOP_BASE_ADDR,
 	.fuse_bank = 1,
@@ -565,7 +565,7 @@
 	return 0;
 }
 
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 /*
  * cfg_val will be used for
  * Boot_cfg4[7:0]:Boot_cfg3[7:0]:Boot_cfg2[7:0]:Boot_cfg1[7:0]
@@ -600,7 +600,7 @@
 
 void reset_misc(void)
 {
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 #if defined(CONFIG_VIDEO_MXS) && !defined(CONFIG_VIDEO)
 	lcdif_power_down();
 #endif