systemc: Start using the m5.systemc module in the test config.py.

Start using sc_main and sc_main_result from the systemc module, and
stop using the versions of those functions which are attached to the
SystemC_Kernel SimObject.

Change-Id: I802898038c80ed36e6a9176211cffb7e0fde2d7e
Reviewed-on: https://gem5-review.googlesource.com/c/16564
Maintainer: Gabe Black <gabeblack@google.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>

src/systemc/tests/config.py

@@ -47,13 +47,13 @@ args = parser.parse_args()
 if args.working_dir:
     os.chdir(args.working_dir)
 
-kernel.sc_main('gem5_systemc_test');
+m5.systemc.sc_main('gem5_systemc_test');
 
 m5.instantiate(None)
 
 cause = m5.simulate(m5.MaxTick).getCause()
 
-result = kernel.sc_main_result()
+result = m5.systemc.sc_main_result()
 if result.code != 0:
     # Arguably this should make gem5 fail, but some tests purposefully
     # generate errors, and as long as their output matches that's still