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/clk/altera/clk-agilex5.c b/drivers/clk/altera/clk-agilex5.c
index 72b9234..716c715 100644
--- a/drivers/clk/altera/clk-agilex5.c
+++ b/drivers/clk/altera/clk-agilex5.c
@@ -263,7 +263,7 @@
 		clk_write_ctrl(plat,
 			       CM_REG_READL(plat, CLKMGR_CTRL) & ~CLKMGR_CTRL_BOOTMODE);
 	} else {
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 		/* Always force clock manager into boot mode before any configuration */
 		clk_write_ctrl(plat,
 			       CM_REG_READL(plat, CLKMGR_CTRL) | CLKMGR_CTRL_BOOTMODE);