drivers: 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/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c
index 0b39612..9fff1bc 100644
--- a/drivers/mmc/tmio-common.c
+++ b/drivers/mmc/tmio-common.c
@@ -385,7 +385,7 @@
 			return false;
 	}
 
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 	if (IS_ENABLED(CONFIG_ARCH_UNIPHIER) && !IS_ENABLED(CONFIG_ARM64)) {
 		/*
 		 * For UniPhier ARMv7 SoCs, the stack is allocated in locked