staging: css2400/sh_css: Remove parentheses from return arguments

The sematic patch used for this is:
@@
identifier i;
constant c;
@@
return
- (
    \(i\|-i\|i(...)\|c\)
- )
  ;

Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>