sim: Switch from EventWrapper to MemberEventWrapper before deprec

Change-Id: I25c81787d522a0dd063112b6727669da46e0f0e7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67655
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>

util/systemc/systemc_within_gem5/systemc_simple_object/feeder.hh

@@ -64,7 +64,7 @@ class Feeder : public gem5::SimObject
     // except to help interact with systemc objects/models.
     sc_core::sc_buffer<const char *> buf;
 
-    gem5::EventWrapper<Feeder, &Feeder::feed> event;
+    gem5::MemberEventWrapper<&Feeder::feed> event;
 
     void startup() override;
 };