ath9k: use a switch for revising supported hw mac revisions

This makes adding new hw revisions a one line change here.
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

@@ -662,13 +662,16 @@ static struct ath_hw *ath9k_hw_do_attach(u16 devid, struct ath_softc *sc,
 	DPRINTF(sc, ATH_DBG_RESET, "serialize_regmode is %d\n",
 		ah->config.serialize_regmode);
 
-	if ((ah->hw_version.macVersion != AR_SREV_VERSION_5416_PCI) &&
-	    (ah->hw_version.macVersion != AR_SREV_VERSION_5416_PCIE) &&
-	    (ah->hw_version.macVersion != AR_SREV_VERSION_9160) &&
-	    (ah->hw_version.macVersion != AR_SREV_VERSION_9100) &&
-	    (ah->hw_version.macVersion != AR_SREV_VERSION_9280) &&
-	    (ah->hw_version.macVersion != AR_SREV_VERSION_9285) &&
-	    (ah->hw_version.macVersion != AR_SREV_VERSION_9287)) {
+	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:
 		DPRINTF(sc, ATH_DBG_FATAL,
 			"Mac Chip Rev 0x%02x.%x is not supported by "
 			"this driver\n", ah->hw_version.macVersion,