xpl: Rename spl_phase_prefix() and spl_phase_name()

Use simpler names for these functions.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/spl.c b/arch/sandbox/cpu/spl.c
index 71d785f..c50df5f 100644
--- a/arch/sandbox/cpu/spl.c
+++ b/arch/sandbox/cpu/spl.c
@@ -27,8 +27,8 @@
 	const char *cur_prefix, *next_prefix;
 	int ret;
 
-	cur_prefix = spl_phase_prefix(xpl_phase());
-	next_prefix = spl_phase_prefix(xpl_next_phase());
+	cur_prefix = xpl_prefix(xpl_phase());
+	next_prefix = xpl_prefix(xpl_next_phase());
 	ret = os_find_u_boot(fname, maxlen, use_img, cur_prefix, next_prefix);
 	if (ret)
 		return log_msg_ret("find", ret);
diff --git a/arch/x86/lib/tpl.c b/arch/x86/lib/tpl.c
index 0606b4a..f7df7e0 100644
--- a/arch/x86/lib/tpl.c
+++ b/arch/x86/lib/tpl.c
@@ -103,7 +103,7 @@
 
 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 {
-	debug("Jumping to %s at %lx\n", spl_phase_name(xpl_next_phase()),
+	debug("Jumping to %s at %lx\n", xpl_name(xpl_next_phase()),
 	      (ulong)spl_image->entry_point);
 #ifdef DEBUG
 	print_buffer(spl_image->entry_point, (void *)spl_image->entry_point, 1,