Clean up board.c files

Just renaming functions and reordering #defines; no functional changes.

BUG=chrome-os-partner:18343
BRANCH=none
TEST=build all EC boards

Change-Id: I90e9ea860110625012cd5fb99de966283ec82880
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/47179
Reviewed-by: Vic Yang <victoryang@chromium.org>

include/pmu_tpschrome.h

@@ -243,17 +243,6 @@ int pmu_enable_ext_control(int enable);
  */
 int pmu_set_fastcharge(enum FASTCHARGE_TIMEOUT timeout);
 
-/**
- * Get AC state
- *
- * @return 0        AC off
- * @return 1        AC on
- *
- * This is a board specific function as we get the PMU VACG signal
- * through a GPIO.
- */
-int board_get_ac(void);
-
 /**
  * Reset the entire board if it is capable
  */
@@ -274,5 +263,15 @@ enum charging_state charge_get_state(void);
  */
 int charge_keep_power_off(void);
 
+#ifdef CONFIG_PMU_BOARD_INIT
+/**
+ * Initialize PMU registers using board settings.
+ *
+ * Boards may supply this function if needed.  This will be called from
+ * pmu_init().
+ */
+int pmu_board_init(void);
+#endif
+
 #endif /* __CROS_EC_TPSCHROME_H */