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-keystone/Makefile b/arch/arm/mach-keystone/Makefile
index 6c7c250..c864317 100644
--- a/arch/arm/mach-keystone/Makefile
+++ b/arch/arm/mach-keystone/Makefile
@@ -10,7 +10,7 @@
 obj-y	+= clock.o
 obj-y	+= mon.o
 CFLAGS_REMOVE_mon.o := $(LTO_CFLAGS)
-ifndef CONFIG_SPL_BUILD
+ifndef CONFIG_XPL_BUILD
 obj-y	+= cmd_clock.o
 obj-y	+= cmd_mon.o
 obj-y	+= cmd_poweroff.o
diff --git a/arch/arm/mach-keystone/config.mk b/arch/arm/mach-keystone/config.mk
index 8eccbdb..925a2de 100644
--- a/arch/arm/mach-keystone/config.mk
+++ b/arch/arm/mach-keystone/config.mk
@@ -7,7 +7,7 @@
 
 include  $(srctree)/arch/arm/mach-omap2/config_secure.mk
 
-ifndef CONFIG_SPL_BUILD
+ifndef CONFIG_XPL_BUILD
 ifeq ($(CONFIG_TI_SECURE_DEVICE),y)
 INPUTS-y += u-boot_HS_MLO
 else
@@ -25,7 +25,7 @@
 u-boot-spi.gph: spl/u-boot-spl.gph u-boot.img FORCE
 	$(call if_changed,pad_cat)
 
-ifndef CONFIG_SPL_BUILD
+ifndef CONFIG_XPL_BUILD
 MKIMAGEFLAGS_MLO = -A $(ARCH) -T gpimage -C none \
 	-a $(CONFIG_TEXT_BASE) -e $(CONFIG_TEXT_BASE) -n U-Boot
 MLO: u-boot.bin FORCE
diff --git a/arch/arm/mach-keystone/mon.c b/arch/arm/mach-keystone/mon.c
index b945e19..f99b9fb 100644
--- a/arch/arm/mach-keystone/mon.c
+++ b/arch/arm/mach-keystone/mon.c
@@ -134,7 +134,7 @@
 	 * via YMODEM. This is done to avoid disturbing the YMODEM serial
 	 * protocol transactions.
 	 */
-	if (!(IS_ENABLED(CONFIG_SPL_BUILD) &&
+	if (!(IS_ENABLED(CONFIG_XPL_BUILD) &&
 	      IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
 	      spl_boot_device() == BOOT_DEVICE_UART))
 		printf("Authentication passed\n");