staging: wilc1000: host_interface: add spaces around '='

Fix coding style error by placing spaces around '=' as suggested by
checkpatch.pl script.

Signed-off-by: Sunil Shahu <shshahu@gmail.com>
Reviewed-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>