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/fpga/intel_sdm_mb.c b/drivers/fpga/intel_sdm_mb.c
index 45caef4..5a65bd9 100644
--- a/drivers/fpga/intel_sdm_mb.c
+++ b/drivers/fpga/intel_sdm_mb.c
@@ -17,7 +17,7 @@
 #define RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS		60000
 #define RECONFIG_STATUS_INTERVAL_DELAY_US		1000000
 
-#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_ATF)
+#if !defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_ATF)
 
 #define BITSTREAM_CHUNK_SIZE				0xFFFF0
 #define RECONFIG_STATUS_POLL_RETRY_MAX			100