qcacmn: Change WMI API's event_buf length type to uint32_t

Change all the WMI API's event buf length param to
uint32_t to adjust to event buf length param type
in the wmi_unified_event_handler().These changes are
needed to converge on the common service ready handlers.

Change-Id: I553bab579f514c356b59b003c0ec66c17e60e26f
CRs-Fixed: 1110768
2 files changed