Rewrite ps2 port (keyboard/mouse) handling.

Use command sending code for communicating with the ps2 port.
diff --git a/Makefile b/Makefile
index c7ab73a..abe60a7 100644
--- a/Makefile
+++ b/Makefile
@@ -9,8 +9,8 @@
 
 # Source files
 SRCBOTH=output.c util.c floppy.c ata.c system.c mouse.c kbd.c pci.c \
-        serial.c clock.c pic.c cdrom.c
-SRC16=$(SRCBOTH) disk.c apm.c pcibios.c
+        serial.c clock.c pic.c cdrom.c ps2port.c
+SRC16=$(SRCBOTH) disk.c apm.c pcibios.c vgahooks.c
 SRC32=$(SRCBOTH) post.c shadow.c post_menu.c memmap.c coreboot.c boot.c \
       acpi.c pirtable.c smm.c smpdetect.c mptable.c smbios.c pciinit.c
 TABLESRC=font.c cbt.c floppy_dbt.c