qcacld-3.0: fill period to send CoAP keepalive message
Fill param 'timeout' for WMI_WOW_COAP_ADD_KEEPALIVE_PATTERN_CMDID,
which represents the period to send CoAP keepalive message.
Change-Id: I86b87470277eee00de9e33a07e635dd1a5412f3d
CRs-Fixed: 3275955