ath9k: Reorganize code in xmit.c

This patch starts cleaning up all the crufty code in transmission path,
grouping functions into logical blocks.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 68bda23..46172b5 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -23,7 +23,7 @@
 		{ VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
 			5400, 0x0b, 0x00, 12,
 			0, 2, 1, 0, 0, 0, 0, 0 },
-		{ VALID,	VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
+		{ VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
 			7800,  0x0f, 0x00, 18,
 			0, 3, 1, 1, 1, 1, 1, 0 },
 		{ VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */