staging: ks7010: factor out ks_wlan_private init process into ks7010_private_init

This commit extract ks_wlan_private initialization process
into a new function ks7010_private_init to improve a bit
readability.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>