Staging: rtl8188eu: rtl8188e_rxdesc: Use !x instead of x == NULL.

Use !x instead of x == NULL.
Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/hal/rtl8188e_rxdesc.c

@@ -40,7 +40,7 @@ static void process_link_qual(struct adapter *padapter,
 	struct rx_pkt_attrib *pattrib;
 	struct signal_stat *signal_stat;
 
-	if (prframe == NULL || padapter == NULL)
+	if (!prframe || !padapter)
 		return;
 
 	pattrib = &prframe->attrib;