util: trim trailing space for files src/util/**/*

Using the following bash script doing that
```
cd src/util
find . -type f -print0 | xargs -0 -n1 sed -i 's/[ \t]*$//'
```

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15093>

src/util/format/u_format_table.py

@@ -140,9 +140,9 @@ def write_format_table(formats):
     print()
 
     write_format_table_header(sys.stdout2)
-    
+
     u_format_pack.generate(formats)
-    
+
     def do_channel_array(channels, swizzles):
         print("   {")
         for i in range(4):