ath9k: Fix bug in deciphering channel flags

CHANNEL_CCK flag is set for all 2 Ghz channels, so IS_CHAN_CCK() would
turn out to be true for all channles in that band.
Use IS_CHAN_B() now, which checks the channel mode and not the channel
flags.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h
index 6b0e3dd..5b9bc54 100644
--- a/drivers/net/wireless/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath9k/ath9k.h
@@ -476,12 +476,10 @@
        (((_c)->channelFlags & CHANNEL_A_HT20) == CHANNEL_A_HT20) || \
        (((_c)->channelFlags & CHANNEL_A_HT40PLUS) == CHANNEL_A_HT40PLUS) || \
        (((_c)->channelFlags & CHANNEL_A_HT40MINUS) == CHANNEL_A_HT40MINUS))
-#define IS_CHAN_B(_c) (((_c)->channelFlags & CHANNEL_B) == CHANNEL_B)
 #define IS_CHAN_G(_c) ((((_c)->channelFlags & (CHANNEL_G)) == CHANNEL_G) || \
        (((_c)->channelFlags & CHANNEL_G_HT20) == CHANNEL_G_HT20) || \
        (((_c)->channelFlags & CHANNEL_G_HT40PLUS) == CHANNEL_G_HT40PLUS) || \
        (((_c)->channelFlags & CHANNEL_G_HT40MINUS) == CHANNEL_G_HT40MINUS))
-#define IS_CHAN_CCK(_c) (((_c)->channelFlags & CHANNEL_CCK) != 0)
 #define IS_CHAN_OFDM(_c) (((_c)->channelFlags & CHANNEL_OFDM) != 0)
 #define IS_CHAN_5GHZ(_c) (((_c)->channelFlags & CHANNEL_5GHZ) != 0)
 #define IS_CHAN_2GHZ(_c) (((_c)->channelFlags & CHANNEL_2GHZ) != 0)
@@ -490,6 +488,7 @@
 #define IS_CHAN_QUARTER_RATE(_c) (((_c)->channelFlags & CHANNEL_QUARTER) != 0)
 
 /* These macros check chanmode and not channelFlags */
+#define IS_CHAN_B(_c) ((_c)->chanmode == CHANNEL_B)
 #define IS_CHAN_HT20(_c) (((_c)->chanmode == CHANNEL_A_HT20) ||	\
 			  ((_c)->chanmode == CHANNEL_G_HT20))
 #define IS_CHAN_HT40(_c) (((_c)->chanmode == CHANNEL_A_HT40PLUS) ||	\