staging: vt6655: Compress return logic

Simplify function returns by merging assignment and return into
one command line.
Found with Coccinelle
@@
local idexpression ret;
expression e;
@@

-ret =
+return
     e;
-return ret;

Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>