Renamed board init function.

Author: PontusO

src/boards/boards.c

@@ -63,7 +63,7 @@ bool button_pressed(uint32_t pin)
 }
 
 // This is declared so that a board specific init can be called from here.
-void __attribute__((weak)) extern_board_init(void) { }
+void __attribute__((weak)) board_init_extra(void) { }
 void board_init(void)
 {
   // stop LF clock just in case we jump from application without reset

src/boards/challenger_840_ble/pinconfig.c

@@ -19,7 +19,7 @@ const uint32_t bootloaderConfig[] =
   /* CF2 END */
 };
 
-void extern_board_init(void)
+void board_init_extra(void)
 {
   // Turn LDO on
   nrf_gpio_cfg_output(LDO_CONTROL_PIN);