wlan: Use request manager while requesting fw mem dump

We are transitioning to the new request manager framework. Change
wlan_hdd_fw_mem_dump_req() and wlan_hdd_fw_mem_dump_cb to this
framework.

Change-Id: Ia9c1c43a837d391716cc4ac82a47986223854c15
CRs-Fixed: 2215453
diff --git a/CORE/HDD/inc/wlan_hdd_main.h b/CORE/HDD/inc/wlan_hdd_main.h
index 2e3b606..eca0d14 100644
--- a/CORE/HDD/inc/wlan_hdd_main.h
+++ b/CORE/HDD/inc/wlan_hdd_main.h
@@ -1483,13 +1483,13 @@
  * callback type to check fw mem dump request.Called from SVC
  * context and update status in HDD.
  */
-typedef void (*hdd_fw_mem_dump_req_cb)(struct hdd_fw_mem_dump_req_ctx *);
+typedef void (*hdd_fw_mem_dump_req_cb)(void *context);
 
 int memdump_init(void);
 int memdump_deinit(void);
 void wlan_hdd_fw_mem_dump_cb(void *,tAniFwrDumpRsp *);
 int wlan_hdd_fw_mem_dump_req(hdd_context_t * pHddCtx);
-void wlan_hdd_fw_mem_dump_req_cb(struct hdd_fw_mem_dump_req_ctx*);
+void wlan_hdd_fw_mem_dump_req_cb(void *context);
 #ifdef WLAN_FEATURE_LINK_LAYER_STATS
 /**
  * struct hdd_ll_stats_context - hdd link layer stats context