Fix wpa_priv build

Signed-hostap: Jouni Malinen <j@w1.fi>

wpa_supplicant/Makefile

@@ -1414,6 +1414,7 @@ CFLAGS += -DCONFIG_OFFCHANNEL
 endif
 
 OBJS += ../src/drivers/driver_common.o
+OBJS_priv += ../src/drivers/driver_common.o
 
 OBJS_wpa_rm := ctrl_iface.o ctrl_iface_unix.o
 OBJS_wpa := $(filter-out $(OBJS_wpa_rm),$(OBJS)) $(OBJS_h) tests/test_wpa.o