madwifi: the openwrt build system usually has a better idea of what the target arch is than the madwifi build system :)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15788 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/madwifi/Makefile

@@ -189,6 +189,7 @@ MADWIFI_INC = \
 MAKE_ARGS:= \
 	PATH="$(TARGET_PATH)" \
 	ARCH="$(LINUX_KARCH)" \
+	ARCH-y="$(LINUX_KARCH)" \
 	CROSS_COMPILE="$(TARGET_CROSS)" \
 	TARGET="$(HAL_TARGET)" \
 	TOOLPREFIX="$(KERNEL_CROSS)" \