ath9k: add ar9271 revision and subrevision ID helpers

These will be used later to add support for ar9271.

Cc: Stephen Chen <stephen.chen@atheros.com>
Cc: Zhifeng Cai <zhifeng.cai@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/reg.h

@@ -744,6 +744,9 @@
 #define AR_SREV_VERSION_9287                  0x180
 #define AR_SREV_REVISION_9287_10              0
 #define AR_SREV_REVISION_9287_11              1
+#define AR_SREV_VERSION_9271			0x140
+#define AR_SREV_REVISION_9271_10		0
+#define AR_SREV_REVISION_9271_11		1
 
 #define AR_SREV_5416(_ah) \
 	(((_ah)->hw_version.macVersion == AR_SREV_VERSION_5416_PCI) || \
@@ -815,6 +818,15 @@
 	 (((_ah)->hw_version.macVersion == AR_SREV_VERSION_9287) && \
 	  ((_ah)->hw_version.macRev >= AR_SREV_REVISION_9287_11)))
 
+#define AR_SREV_9271(_ah) \
+    (((_ah))->hw_version.macVersion == AR_SREV_VERSION_9271)
+#define AR_SREV_9271_10(_ah) \
+    (AR_SREV_9271(_ah) && \
+     ((_ah)->hw_version.macRev == AR_SREV_REVISION_9271_10))
+#define AR_SREV_9271_11(_ah) \
+    (AR_SREV_9271(_ah) && \
+     ((_ah)->hw_version.macRev == AR_SREV_REVISION_9271_11))
+
 #define AR_RADIO_SREV_MAJOR                   0xf0
 #define AR_RAD5133_SREV_MAJOR                 0xc0
 #define AR_RAD2133_SREV_MAJOR                 0xd0