rt2800: do not nullify initialization vector data

If we restart hw we should keep existing IV (initialization vector)
otherwise HW encryption will be broken after restart.

Also fix some coding style issues on the way.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ralink/rt2x00/rt2800lib.c

@@ -1647,7 +1647,8 @@ static void rt2800_config_wcid_attr_cipher(struct rt2x00_dev *rt2x00dev,
 
 	offset = MAC_IVEIV_ENTRY(key->hw_key_idx);
 
-	memset(&iveiv_entry, 0, sizeof(iveiv_entry));
+	rt2800_register_multiread(rt2x00dev, offset,
+				  &iveiv_entry, sizeof(iveiv_entry));
 	if ((crypto->cipher == CIPHER_TKIP) ||
 	    (crypto->cipher == CIPHER_TKIP_NO_MIC) ||
 	    (crypto->cipher == CIPHER_AES))
@@ -6079,13 +6080,11 @@ static int rt2800_init_registers(struct rt2x00_dev *rt2x00dev)
 	 * ASIC will keep garbage value after boot, clear encryption keys.
 	 */
 	for (i = 0; i < 4; i++)
-		rt2800_register_write(rt2x00dev,
-					 SHARED_KEY_MODE_ENTRY(i), 0);
+		rt2800_register_write(rt2x00dev, SHARED_KEY_MODE_ENTRY(i), 0);
 
 	for (i = 0; i < 256; i++) {
 		rt2800_config_wcid(rt2x00dev, NULL, i);
 		rt2800_delete_wcid_attr(rt2x00dev, i);
-		rt2800_register_write(rt2x00dev, MAC_IVEIV_ENTRY(i), 0);
 	}
 
 	/*