qcacmn: Refine the STA keepalive interface

The unified WMI struct used to support the STA keepalive feature has a
few flaws:
- It is poorly named. Struct sta_params is a very generic name for a
  struct that has a very specific purpose.
- It is poorly designed. It utilizes pointers to the IPv4 and MAC
  addresses rather than support having those addresses within the
  struct itself. This prevents the struct from completely representing
  the payload, which is required if we want to utilize this struct in
  the converged UMAC.

To resolve these issues rename and redesign the struct.

This is co-dependent with I20cf9f54a7ec920a90575ffd73c51708414d46a0
("qcacld-3.0: Use the redesigned STA keepalive interface").

Change-Id: I2a401fa6934f05555cb3c30088af62cfbc9a3c59
CRs-Fixed: 2404895

wmi/inc/wmi_unified_priv.h

@@ -887,7 +887,7 @@ QDF_STATUS (*send_vdev_set_gtx_cfg_cmd)(wmi_unified_t wmi_handle,
 				  struct wmi_gtx_config *gtx_info);
 
 QDF_STATUS (*send_set_sta_keep_alive_cmd)(wmi_unified_t wmi_handle,
-				struct sta_params *params);
+					  struct sta_keep_alive_params *params);
 
 QDF_STATUS (*send_set_sta_sa_query_param_cmd)(wmi_unified_t wmi_handle,
 					uint8_t vdev_id, uint32_t max_retries,