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-uniphier/debug-uart/Makefile b/arch/arm/mach-uniphier/debug-uart/Makefile
index 81e9314..4202cb3 100644
--- a/arch/arm/mach-uniphier/debug-uart/Makefile
+++ b/arch/arm/mach-uniphier/debug-uart/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0+
 
-ifdef CONFIG_SPL_BUILD
+ifdef CONFIG_XPL_BUILD
 obj-$(CONFIG_ARCH_UNIPHIER_LD4)		+= debug-uart-ld4.o
 obj-$(CONFIG_ARCH_UNIPHIER_PRO4)	+= debug-uart-pro4.o
 obj-$(CONFIG_ARCH_UNIPHIER_SLD8)	+= debug-uart-sld8.o
diff --git a/arch/arm/mach-uniphier/debug-uart/debug-uart.c b/arch/arm/mach-uniphier/debug-uart/debug-uart.c
index 1ba012c..6836eb6 100644
--- a/arch/arm/mach-uniphier/debug-uart/debug-uart.c
+++ b/arch/arm/mach-uniphier/debug-uart/debug-uart.c
@@ -26,7 +26,7 @@
 	writel(c, base + UNIPHIER_UART_TX);
 }
 
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 void sg_set_pinsel(unsigned int pin, unsigned int muxval,
 		   unsigned int mux_bits, unsigned int reg_stride)
 {
@@ -56,7 +56,7 @@
 
 void _debug_uart_init(void)
 {
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 	void __iomem *base = (void __iomem *)CONFIG_VAL(DEBUG_UART_BASE);
 	unsigned int divisor;