staging: correct dubious use of !x & y

Noticed by sparse:
drivers/staging/me4000/me4000.c:1213:43: warning: dubious: !x & y
drivers/staging/wlan-ng/p80211wext.c:1583:21: warning: dubious: !x & y
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/me4000/me4000.c

@@ -1180,7 +1180,7 @@ static int me4000_xilinx_download(struct me4000_info *info)
 
 	/* Wait until /INIT pin is set */
 	udelay(20);
-	if (!inl(info->plx_regbase + PLX_INTCSR) & 0x20) {
+	if (!(inl(info->plx_regbase + PLX_INTCSR) & 0x20)) {
 		printk(KERN_ERR "%s:Can't init Xilinx\n", __func__);
 		return -EIO;
 	}

drivers/staging/wlan-ng/p80211wext.c

@@ -1580,7 +1580,7 @@ static int p80211wext_set_encodeext(struct net_device *dev,
 
 
   if ( ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY ) {
-    if ( ! ext->alg & IW_ENCODE_ALG_WEP) {
+    if (!(ext->alg & IW_ENCODE_ALG_WEP)) {
       WLAN_LOG_DEBUG(1,"asked to set a non wep key :(");
       return -EINVAL;
     }