ath9k: move hw macrevision checker to helper

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/hw.c

@@ -627,6 +627,23 @@ static bool ath9k_hw_devid_supported(u16 devid)
 	return false;
 }
 
+static bool ath9k_hw_macversion_supported(u32 macversion)
+{
+	switch (macversion) {
+	case AR_SREV_VERSION_5416_PCI:
+	case AR_SREV_VERSION_5416_PCIE:
+	case AR_SREV_VERSION_9160:
+	case AR_SREV_VERSION_9100:
+	case AR_SREV_VERSION_9280:
+	case AR_SREV_VERSION_9285:
+	case AR_SREV_VERSION_9287:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+
 int ath9k_hw_attach(struct ath_hw *ah)
 {
 	int r;
@@ -666,16 +683,7 @@ int ath9k_hw_attach(struct ath_hw *ah)
 	DPRINTF(ah->ah_sc, ATH_DBG_RESET, "serialize_regmode is %d\n",
 		ah->config.serialize_regmode);
 
-	switch (ah->hw_version.macVersion) {
-	case AR_SREV_VERSION_5416_PCI:
-	case AR_SREV_VERSION_5416_PCIE:
-	case AR_SREV_VERSION_9160:
-	case AR_SREV_VERSION_9100:
-	case AR_SREV_VERSION_9280:
-	case AR_SREV_VERSION_9285:
-	case AR_SREV_VERSION_9287:
-		break;
-	default:
+	if (!ath9k_hw_macversion_supported(ah->hw_version.macVersion)) {
 		DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 			"Mac Chip Rev 0x%02x.%x is not supported by "
 			"this driver\n", ah->hw_version.macVersion,