Staging: rtl8712: use kmalloc_array over kmalloc

This patch fixes checkpatch.pl warning in file rtl871x_xmit.c
WARNING : prefer kmalloc_array over kmalloc with multiply
Signed-off-by: NTapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_xmit.c

@@ -955,8 +955,8 @@ static void alloc_hwxmits(struct _adapter *padapter)
 	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 
 	pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
-	pxmitpriv->hwxmits = kmalloc(sizeof(struct hw_xmit) * pxmitpriv->hwxmit_entry,
-				     GFP_ATOMIC);
+	pxmitpriv->hwxmits = kmalloc_array(pxmitpriv->hwxmit_entry,
+				sizeof(struct hw_xmit), GFP_ATOMIC);
 	if (pxmitpriv->hwxmits == NULL)
 		return;
 	hwxmits = pxmitpriv->hwxmits;