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/gpio/tegra_gpio.c b/drivers/gpio/tegra_gpio.c
index 0c40d36..6cafffa 100644
--- a/drivers/gpio/tegra_gpio.c
+++ b/drivers/gpio/tegra_gpio.c
@@ -323,7 +323,7 @@
 		return 0;
 
 	/* TODO(sjg@chromium.org): Remove once SPL supports device tree */
-#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_XPL_BUILD
 	ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
 	bank_count = TEGRA_GPIO_BANKS;
 #else