firmware: minor screendump related cleanups

- Remove unused redefinitions of screen_dump() from bootloaders
- Use empty do-while when screendump is compiled out

Change-Id: I3ccdb0390ddaa28d8f561ff744d0db6aaef17f5d

1 files changed, 0 insertions, 4 deletions

diff --git a/bootloader/iriver_h1x0.c b/bootloader/iriver_h1x0.c
index 7efaaa3308..6c509a9922 100644
--- a/bootloader/iriver_h1x0.c
+++ b/bootloader/iriver_h1x0.c
@@ -588,10 +588,6 @@ void main(void)
 
 /* These functions are present in the firmware library, but we reimplement
    them here because the originals do a lot more than we want */
-void screen_dump(void)
-{
-}
-
 int usb_screen(void)
 {
    return 0;