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/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index dcc924d..32401f5 100644
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -71,7 +71,7 @@
  */
 #if defined(CONFIG_TPL_BUILD) && defined(CONFIG_TPL_NEEDS_SEPARATE_STACK)
 	ldr	x0, =(CONFIG_TPL_STACK)
-#elif defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK)
+#elif defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_STACK)
 	ldr	x0, =(CONFIG_SPL_STACK)
 #elif defined(CONFIG_INIT_SP_RELATIVE)
 #if CONFIG_POSITION_INDEPENDENT
@@ -99,7 +99,7 @@
 	mov	x0, #0
 	bl	board_init_f
 
-#if !defined(CONFIG_SPL_BUILD)
+#if !defined(CONFIG_XPL_BUILD)
 /*
  * Set up intermediate environment (new sp and gd) and call
  * relocate_code(addr_moni). Trick here is that we'll return
@@ -139,9 +139,9 @@
  * Set up final (full) environment
  */
 	bl	c_runtime_cpu_setup		/* still call old routine */
-#endif /* !CONFIG_SPL_BUILD */
-#if !defined(CONFIG_SPL_BUILD) || CONFIG_IS_ENABLED(FRAMEWORK)
-#if defined(CONFIG_SPL_BUILD)
+#endif /* !CONFIG_XPL_BUILD */
+#if !defined(CONFIG_XPL_BUILD) || CONFIG_IS_ENABLED(FRAMEWORK)
+#if defined(CONFIG_XPL_BUILD)
 	bl	spl_relocate_stack_gd           /* may return NULL */
 	/* set up gd here, outside any C code, if new stack is returned */
 	cmp	x0, #0