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/liebherr/display5/Makefile b/board/liebherr/display5/Makefile
index ee503ad..c62583a 100644
--- a/board/liebherr/display5/Makefile
+++ b/board/liebherr/display5/Makefile
@@ -4,7 +4,7 @@
 #
 # SPDX-License-Identifier:    GPL-2.0+
 #
-ifdef CONFIG_SPL_BUILD
+ifdef CONFIG_XPL_BUILD
 obj-y = spl.o
 else
 obj-y := display5.o
diff --git a/board/liebherr/mccmon6/Makefile b/board/liebherr/mccmon6/Makefile
index 3c9786c..d5fdc20 100644
--- a/board/liebherr/mccmon6/Makefile
+++ b/board/liebherr/mccmon6/Makefile
@@ -2,7 +2,7 @@
 #
 # (C) Copyright 2016-2017
 # Lukasz Majewski, DENX Software Engineering, lukma@denx.de
-ifdef CONFIG_SPL_BUILD
+ifdef CONFIG_XPL_BUILD
 obj-y  := spl.o
 else
 obj-y  := mccmon6.o
diff --git a/board/liebherr/xea/Makefile b/board/liebherr/xea/Makefile
index abf5008..6efa07c 100644
--- a/board/liebherr/xea/Makefile
+++ b/board/liebherr/xea/Makefile
@@ -7,6 +7,6 @@
 
 obj-y	:= xea.o
 
-ifdef	CONFIG_SPL_BUILD
+ifdef	CONFIG_XPL_BUILD
 obj-y	+= spl_xea.o
 endif
diff --git a/board/liebherr/xea/xea.c b/board/liebherr/xea/xea.c
index 9ade356..1d4f165 100644
--- a/board/liebherr/xea/xea.c
+++ b/board/liebherr/xea/xea.c
@@ -37,7 +37,7 @@
 #include <spi.h>
 #include <spi_flash.h>
 
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 #include <spl.h>
 #endif
 
@@ -62,7 +62,7 @@
 	mxs_set_sspclk(MXC_SSPCLK3, 96000, 0);
 }
 
-#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_FRAMEWORK)
+#if defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_FRAMEWORK)
 void board_init_f(ulong arg)
 {
 	init_clocks();
@@ -355,4 +355,4 @@
 	.id             = UCLASS_CLK,
 	.of_match       = imx28_clk_ids,
 };
-#endif	/* CONFIG_SPL_BUILD */
+#endif	/* CONFIG_XPL_BUILD */