[Silabs] Wi-fi: Cleanup wfx host events header file (project-chip#35430)

* Added the common wfx_host_events header for efr and 917 SoC platforms

* Cleanup task priority macros

* Added macros only for RS9116

* Resolved review comments

* Cleaned up wf200 macros

* Cleaned up 917 SoC and NCP macros

Author: bhmanda-silabs

src/platform/silabs/SiWx917/BUILD.gn

@@ -101,7 +101,7 @@ static_library("SiWx917") {
     "${silabs_platform_dir}/ConnectivityManagerImpl_WIFI.cpp",
     "${silabs_platform_dir}/NetworkCommissioningWiFiDriver.cpp",
     "${silabs_platform_dir}/NetworkCommissioningWiFiDriver.h",
-    "wifi/wfx_host_events.h",
+    "${silabs_platform_dir}/wifi/wfx_host_events.h",
     "wifi/wfx_msgs.h",
     "wifi/wifi_config.h",
   ]

src/platform/silabs/SiWx917/wifi/wfx_host_events.h

@@ -159,7 +159,7 @@ static_library("efr32") {
       "${silabs_platform_dir}/ConnectivityManagerImpl_WIFI.cpp",
       "${silabs_platform_dir}/NetworkCommissioningWiFiDriver.cpp",
       "${silabs_platform_dir}/NetworkCommissioningWiFiDriver.h",
-      "wifi/wfx_host_events.h",
+      "${silabs_platform_dir}/wifi/wfx_host_events.h",
       "wifi/wfx_msgs.h",
       "wifi/wifi_config.h",
     ]