rt2x00: checkpatch.pl error fixes for rt2x00dev.c

rt2x00dev.c:689: ERROR: spaces required around that '=' (ctx:WxV)
Signed-off-by: NMark Einon <mark.einon@gmail.com>
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00dev.c

@@ -686,7 +686,7 @@ static void rt2x00lib_rate(struct ieee80211_rate *entry,
 {
 	entry->flags = 0;
 	entry->bitrate = rate->bitrate;
-	entry->hw_value =index;
+	entry->hw_value = index;
 	entry->hw_value_short = index;
 
 	if (rate->flags & DEV_RATE_SHORT_PREAMBLE)