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/include/asm/arch-rk3066/boot0.h b/arch/arm/include/asm/arch-rk3066/boot0.h
index 6bf3828..eaf8155 100644
--- a/arch/arm/include/asm/arch-rk3066/boot0.h
+++ b/arch/arm/include/asm/arch-rk3066/boot0.h
@@ -10,7 +10,7 @@
  * (containing the magic 'RK30'). This magic constant will be written into
  * the final image by the rkimage tool, but we need to reserve space for it here.
  */
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 	b	1f  /* if overwritten, entry-address is at the next word */
 1:
 #endif
@@ -68,7 +68,7 @@
 	pop	{r1-r12, pc}
 #endif
 
-#if (defined(CONFIG_SPL_BUILD))
+#if (defined(CONFIG_XPL_BUILD))
 /* U-Boot proper of armv7 does not need this */
 	b reset
 #endif