fix sw_64 build error
fixdep: error opening depfile: ./.plugin_cfg80211.o.d: No such file or directory
fixdep: error opening depfile: ./.plugin_xen.o.d: No such file or directory
fixdep: error opening depfile: ./.plugin_cfg80211.o.d: No such file or directory
fixdep: error opening depfile: ./.plugin_xen.o.d: No such file or directory