staging: rtl8723au: Remove redundant casting in rtw_sta_mgt.c

Casting value returned by k[cmz]alloc is useless.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723au/core/rtw_sta_mgt.c

@@ -116,7 +116,7 @@ rtw_alloc_stainfo23a(struct sta_priv *pstapriv, u8 *hwaddr, gfp_t gfp)
 	int i = 0;
 	u16  wRxSeqInitialValue = 0xffff;
 
-	psta = (struct sta_info *)kmalloc(sizeof(struct sta_info), gfp);
+	psta = kmalloc(sizeof(struct sta_info), gfp);
 	if (!psta)
 		return NULL;