fix alsa compile error (backport from buildroot-ng)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@3863 3c298f89-4303-0410-b956-a3cf2f4a3e73

openwrt/target/linux/package/alsa/patches/100-compile_fix.patch

@@ -0,0 +1,18 @@
+diff -urN alsa.old/include/adriver.h alsa.dev/include/adriver.h
+--- alsa.old/include/adriver.h	2006-04-19 08:24:30.000000000 +0200
++++ alsa.dev/include/adriver.h	2006-05-31 17:24:49.000000000 +0200
+@@ -451,7 +451,7 @@
+ #endif /* < 2.6.0 */
+ 
+ /* workarounds for USB API */
+-#if defined(SND_NEED_USB_WRAPPER) && (defined(CONFIG_USB) || defined(CONFIG_USB_MODULE))
++#if 1
+ 
+ #include <linux/usb.h>
+ 
+@@ -1174,4 +1174,5 @@
+  */
+ #define OPL3_HW_OPL3_PC98	0x0305	/* PC9800 */
+ 
++#undef info /* used in several structs */
+ #endif /* __SOUND_LOCAL_DRIVER_H */