[Utils] btn_wait_timeout

- Allow btn_wait_timeout to be triggered immediately
- Make power options global

bootloader/utils/btn.h

@@ -20,12 +20,12 @@
 
 #include "types.h"
 
-#define BTN_POWER 0x1
-#define BTN_VOL_DOWN 0x2
-#define BTN_VOL_UP 0x4
+#define BTN_POWER    (1 << 0)
+#define BTN_VOL_DOWN (1 << 1)
+#define BTN_VOL_UP   (1 << 2)
 
-u32 btn_read();
-u32 btn_wait();
-u32 btn_wait_timeout(u32 time_ms, u32 mask);
+u8 btn_read();
+u8 btn_wait();
+u8 btn_wait_timeout(u32 time_ms, u8 mask);
 
 #endif