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.

gflib/io_reg.c

@@ -17,8 +17,8 @@ static const u32 sUnused[] = {
     (1 << 26) | (1 << 4) | (1 << 2) | (1 << 1),
     (1 << 26) | (1 << 4) | (1 << 3) | (1 << 1),
     (1 << 26) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1),
-    (1 << 25) | (1 << 8), 
-    (1 << 27) | (1 << 10), 
+    (1 << 25) | (1 << 8),
+    (1 << 27) | (1 << 10),
 };
 
 const u16 gOverworldBackgroundLayerFlags[] = {