Hook up Bidirectional LPT, EPP, and ECP to all Super I/O chips (missing is vendor-specific Configuration Register B behavior but that's next on my list), fixed Super I/O chip mistakes for a number of machines, split 286/386SX/M6117D machines into three separate files and reordered them as well.

src/machine/CMakeLists.txt

@@ -42,7 +42,9 @@ add_library(mch OBJECT
     m_ps2_isa.c
     m_ps2_mca.c
     m_at_compaq.c
-    m_at_286_386sx.c
+    m_at_286.c
+    m_at_386sx.c
+    m_at_m6117.c
     m_at_386dx_486.c
     m_at_socket4.c
     m_at_socket5.c