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/include/spl.h b/include/spl.h
index 50ffe4f..b2978d8 100644
--- a/include/spl.h
+++ b/include/spl.h
@@ -194,11 +194,11 @@
 }
 
 /**
- * spl_phase_name() - Get the name of the current phase
+ * xpl_name() - Get the name of a phase
  *
  * Return: phase name
  */
-static inline const char *spl_phase_name(enum xpl_phase_t phase)
+static inline const char *xpl_name(enum xpl_phase_t phase)
 {
 	switch (phase) {
 	case PHASE_TPL:
@@ -216,12 +216,12 @@
 }
 
 /**
- * spl_phase_prefix() - Get the prefix  of the current phase
+ * xpl_prefix() - Get the prefix  of the current phase
  *
  * @phase: Phase to look up
  * Return: phase prefix ("spl", "tpl", etc.)
  */
-static inline const char *spl_phase_prefix(enum xpl_phase_t phase)
+static inline const char *xpl_prefix(enum xpl_phase_t phase)
 {
 	switch (phase) {
 	case PHASE_TPL: