esp8266: Switch to standard mp_hal_ticks_ms() MPHAL function.
diff --git a/esp8266/esp_mphal.c b/esp8266/esp_mphal.c
index 44ccea4..471b1fe 100644
--- a/esp8266/esp_mphal.c
+++ b/esp8266/esp_mphal.c
@@ -82,7 +82,7 @@
     }
 }
 
-uint32_t HAL_GetTick(void) {
+uint32_t mp_hal_ticks_ms(void) {
     return system_get_time() / 1000;
 }