Removed trailing spaces in the most relevant files

Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include  *.s --include  *.inc --include  *.txt *  | xargs sed -i 's/\s\+$//g'

Credits to Grant Murphy from Stack Overflow.

src/rayquaza_scene.c

@@ -2392,7 +2392,7 @@ static void SpriteCB_Descends_Rayquaza(struct Sprite *sprite)
 {
     s16 *data = sprite->data;
     s16 frame = sTimer;
-    
+
     // Updates to Rayquaza's coords occur more frequently
     // as time goes on (it accelerates as it emerges)
     if (frame == 0)