staging: tidspbridge: adjust error return code (bugfix)

The variable status is initialized to either 0 or an error code.  Return
status to propagate the error value.

A simplified version of the semantic patch that fixes this problem is as
follows: (http://coccinelle.lip6.fr/

)

// <smpl>
@@
type T;
identifier i;
constant c;
@@

-T i;
<... when != i
-i = c;
...>
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>