FiiO M3K: minor fixes

- Drop obsolete NAND patch script (it's simpler to use 'dd' directly)
- Remove an outdated comment
- Fix missing 'void' in a function definition
- Reset the poweroff timer when we poke the backlight

Change-Id: I752624386f30ac95f41a731d2b6be837e12275a9

firmware/target/mips/ingenic_x1000/fiiom3k/backlight-fiiom3k.c

@@ -43,7 +43,6 @@ bool backlight_hw_init(void)
     pwm_enable(BL_BTN_CHN);
     backlight_hw_brightness(MAX_BRIGHTNESS_SETTING);
     buttonlight_hw_brightness(MAX_BRIGHTNESS_SETTING);
-    /* TODO: avoid buttonlight flicker when powering up the machine */
     return true;
 }
 

firmware/target/mips/ingenic_x1000/fiiom3k/button-fiiom3k.c

@@ -22,6 +22,7 @@
 #include "button.h"
 #include "kernel.h"
 #include "backlight.h"
+#include "powermgmt.h"
 #include "panic.h"
 #include "axp173.h"
 #include "gpio-x1000.h"
@@ -313,6 +314,7 @@ static void ft_step_state(uint32_t t, int evt, int tx, int ty)
             /* Poke the backlight */
             backlight_on();
             buttonlight_on();
+            reset_poweroff_timer();
 
             fsm.orig_x = fsm.cur_x;
             fsm.orig_y = fsm.cur_y;
@@ -481,7 +483,7 @@ int button_read_device(void)
     return r;
 }
 
-bool headphones_inserted()
+bool headphones_inserted(void)
 {
     return hp_detect_reg & 0x40 ? true : false;
 }