madwifi patch cleanup and stability fixes

- fix a semi-random heisenbug by replacing the previous noderef fix with a simple hack that is not 100% correct, but safe.
- add ad-hoc atim fixes by bruno
- add napi polling fixes by sven-ola
- fix compile breakage with debug enabled

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12838 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/madwifi/patches/310-noise_get.patch

@@ -9,7 +9,7 @@
  	ATH_RXBUF_LOCK_IRQ(sc);
  	if (sc->sc_rxbufcur == NULL)
  		sc->sc_rxbufcur = STAILQ_FIRST(&sc->sc_rxbuf);
-@@ -8981,6 +8979,7 @@
+@@ -8975,6 +8973,7 @@
  			sc->sc_curchan.channel);
  		sc->sc_stats.ast_per_calfail++;
  	}
@@ -17,7 +17,7 @@
  
  	ath_hal_process_noisefloor(ah);
  	if (isIQdone == AH_TRUE) {
-@@ -9049,6 +9048,7 @@
+@@ -9043,6 +9042,7 @@
  	struct ath_softc *sc = dev->priv;
  
  	(void) ath_chan_set(sc, ic->ic_curchan);
@@ -25,7 +25,7 @@
  	/*
  	 * If we are returning to our bss channel then mark state
  	 * so the next recv'd beacon's TSF will be used to sync the
-@@ -9317,6 +9317,7 @@
+@@ -9311,6 +9311,7 @@
  		}
  
  		ath_hal_process_noisefloor(ah);