staging: ks7010: replace create_workqueue with alloc_workqueue

This commit replaces deprecated create_workqueue call with the
alloc_workqueue one which is the one to be used now for this
purpose.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>