X86: Change the I8259 from a subdevice into a real SimObject.

--HG--
rename : src/dev/x86/south_bridge/i8259.cc => src/dev/x86/i8259.cc
rename : src/dev/x86/south_bridge/i8259.hh => src/dev/x86/i8259.hh

src/dev/x86/SConscript

@@ -37,3 +37,7 @@ if env['FULL_SYSTEM'] and env['TARGET_ISA'] == 'x86':
     SimObject('Cmos.py')
     Source('cmos.cc')
     TraceFlag('CMOS', 'Accesses to CMOS devices')
+
+    SimObject('I8259.py')
+    Source('i8259.cc')
+    TraceFlag('I8259', 'Accesses to the I8259 PIC devices')