atheros: define shared bssidmask setting

Also make ath5k and ath9k use it, and share register definitions.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index d83b77f8..ceed009 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -17,6 +17,8 @@
 #ifndef REG_H
 #define REG_H
 
+#include "../reg.h"
+
 #define AR_CR                0x0008
 #define AR_CR_RXE            0x00000004
 #define AR_CR_RXD            0x00000020
@@ -1421,9 +1423,6 @@
 #define AR_SLEEP2_BEACON_TIMEOUT    0xFFE00000
 #define AR_SLEEP2_BEACON_TIMEOUT_S  21
 
-#define AR_BSSMSKL            0x80e0
-#define AR_BSSMSKU            0x80e4
-
 #define AR_TPC                 0x80e8
 #define AR_TPC_ACK             0x0000003f
 #define AR_TPC_ACK_S           0x00