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-rockchip/rk3288/rk3288.c b/arch/arm/mach-rockchip/rk3288/rk3288.c
index d1170f7..62dd9da 100644
--- a/arch/arm/mach-rockchip/rk3288/rk3288.c
+++ b/arch/arm/mach-rockchip/rk3288/rk3288.c
@@ -31,7 +31,7 @@
 	[BROM_BOOTSOURCE_SD] = "/mmc@ff0c0000",
 };
 
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 static void configure_l2ctlr(void)
 {
 	u32 l2ctlr;
@@ -72,7 +72,7 @@
 
 int arch_cpu_init(void)
 {
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 	configure_l2ctlr();
 #else
 	/* We do some SoC one time setting here. */