staging: rtl8723au: core: Drop unneeded pointer cast

Void pointers don't need to be cast to other pointer types.
Semantic patch used:

@r@
expression x;
void* e;
type T;
identifier f;
@@

(
  *((T *)e)
|
  ((T *)x) [...]
|
  ((T *)x)->f
|
- (T *)
  e
)
Signed-off-by: NJanani Ravichandran <janani.rvchndrn@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723au/core/rtw_security.c

@@ -1619,7 +1619,7 @@ int rtw_aes_decrypt23a(struct rtw_adapter *padapter,
 
 void rtw_use_tkipkey_handler23a(void *FunctionContext)
 {
-	struct rtw_adapter *padapter = (struct rtw_adapter *)FunctionContext;
+	struct rtw_adapter *padapter = FunctionContext;
 
 	RT_TRACE(_module_rtl871x_security_c_, _drv_err_,
 		 "^^^%s ^^^\n", __func__);