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/input/Makefile b/drivers/input/Makefile
index 71f315a..3e85534 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -8,7 +8,7 @@
 obj-$(CONFIG_$(SPL_TPL_)DM_KEYBOARD) += input.o keyboard-uclass.o
 obj-$(CONFIG_BUTTON_KEYBOARD) += button_kbd.o
 
-ifndef CONFIG_SPL_BUILD
+ifndef CONFIG_XPL_BUILD
 
 obj-$(CONFIG_APPLE_SPI_KEYB) += apple_spi_kbd.o
 obj-$(CONFIG_I8042_KEYB) += i8042.o