staging: csr: remove unneeded call to memset().

In uf_send_pkt_to_encrypt(), the memory area zeroed by this call to memset() is
overwritten by a call to memcpy() a few instructions later, so it is not needed.
Signed-off-by: Cyril Roelandt <tipecaml@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/csr/unifi_sme.c

@@ -1196,7 +1196,6 @@ void uf_send_pkt_to_encrypt(struct work_struct *work)
 
         if (pktBulkDataLength > 0) {
 		    pktBulkData = kmalloc(pktBulkDataLength, GFP_KERNEL);
-		    memset(pktBulkData, 0, pktBulkDataLength);
 	    } else {
 		    unifi_error(priv, "uf_send_pkt_to_encrypt() : invalid buffer\n");
 		    return;