Fix RL compressed data alignment

`RLUnComp`, like `LZ77UnComp`, expects the source data to be word-aligned.
So, to mirror how lz-compressed data is defined as `u32[]` to enforce
word-alignment, this changes rl-compressed data to be defined as `u32[]`
to enforce word-alignment.

include/gba/syscall.h

@@ -61,9 +61,9 @@ void LZ77UnCompWram(const u32 *src, void *dest);
 
 void LZ77UnCompVram(const u32 *src, void *dest);
 
-void RLUnCompWram(const void *src, void *dest);
+void RLUnCompWram(const u32 *src, void *dest);
 
-void RLUnCompVram(const void *src, void *dest);
+void RLUnCompVram(const u32 *src, void *dest);
 
 int MultiBoot(struct MultiBootParam *mp);