xpl: Rename spl_phase() to xpl_phase()

Rename this function to indicate that it refers to any xPL phase.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/lib/fsp2/fsp_init.c b/arch/x86/lib/fsp2/fsp_init.c
index ecbadaa..1a2bf46 100644
--- a/arch/x86/lib/fsp2/fsp_init.c
+++ b/arch/x86/lib/fsp2/fsp_init.c
@@ -25,7 +25,7 @@
 	int ret;
 
 	/* Make sure pads are set up early in U-Boot */
-	if (!ll_boot_init() || spl_phase() != PHASE_BOARD_F)
+	if (!ll_boot_init() || xpl_phase() != PHASE_BOARD_F)
 		return 0;
 
 	/* Probe all pinctrl devices to set up the pads */
@@ -134,7 +134,7 @@
 			return log_msg_ret("Could not get flash mmap", ret);
 	}
 
-	if (spl_phase() >= PHASE_BOARD_F) {
+	if (xpl_phase() >= PHASE_BOARD_F) {
 		if (type != FSP_S)
 			return -EPROTONOSUPPORT;
 		ret = binman_entry_find("intel-fsp-s", entry);