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/200-no_debug.patch

@@ -150,7 +150,7 @@
  	ATH_DEBUG_RATE		= 0x00000010,	/* rate control */
 --- a/tools/do_multi.c
 +++ b/tools/do_multi.c
-@@ -9,16 +9,20 @@
+@@ -10,16 +10,20 @@
  
      progname = basename(argv[0]);