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/lib/fdtdec.c b/lib/fdtdec.c
index 5edc8dd..ab05419 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -608,7 +608,7 @@
 static int fdtdec_prepare_fdt(const void *blob)
 {
 	if (!blob || ((uintptr_t)blob & 3) || fdt_check_header(blob)) {
-		if (spl_phase() <= PHASE_SPL) {
+		if (xpl_phase() <= PHASE_SPL) {
 			puts("Missing DTB\n");
 		} else {
 			printf("No valid device tree binary found at %p\n",
diff --git a/lib/lmb.c b/lib/lmb.c
index 3ed570f..380d92a 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -749,9 +749,9 @@
 	lmb_add_memory();
 
 	/* Reserve the U-Boot image region once U-Boot has relocated */
-	if (spl_phase() == PHASE_SPL)
+	if (xpl_phase() == PHASE_SPL)
 		lmb_reserve_common_spl();
-	else if (spl_phase() == PHASE_BOARD_R)
+	else if (xpl_phase() == PHASE_BOARD_R)
 		lmb_reserve_common((void *)gd->fdt_blob);
 
 	return 0;
diff --git a/lib/time.c b/lib/time.c
index 872f73d..d88edaf 100644
--- a/lib/time.c
+++ b/lib/time.c
@@ -100,7 +100,7 @@
 
 	ret = timer_get_count(gd->timer, &count);
 	if (ret) {
-		if (spl_phase() > PHASE_TPL)
+		if (xpl_phase() > PHASE_TPL)
 			panic("Could not read count from timer (err %d)\n",
 			      ret);
 		else