madwifi: fix x86_64 compilation

SVN-Revision: 12574

package/madwifi/patches/106-get_arch.patch

+--- a/scripts/get_arch.mk
++++ b/scripts/get_arch.mk
+@@ -36,6 +36,13 @@
+ $(Cannot determine ARCH)
+ endif
+ 
++# Allow ARCH to be x86
++ifneq (,$(CONFIG_X86))
++ifeq (x86,$(ARCH))
++ARCH-y = $(ARCH)
++endif
++endif
++
+ # Don't allow ARCH to be overridden by a different value.
+ ifeq (,$(ARCH))
+ ARCH = $(ARCH-y)