Register Parallel/LPC/FWH programmers the same way SPI programmers are registered

All programmers are now calling programmer registration functions and
direct manipulations of buses_supported are not needed/possible anymore.

Note: Programmers without parallel/LPC/FWH chip support should not call
register_par_programmer().

Additional fixes:
Set max_rom_decode.parallel for drkaiser.
Remove abuse of programmer_map_flash_region in it85spi.
Annotate several FIXMEs in it85spi.

Corresponding to flashrom svn r1463.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
diff --git a/it87spi.c b/it87spi.c
index 5fe74ce..1cff3a3 100644
--- a/it87spi.c
+++ b/it87spi.c
@@ -192,7 +192,7 @@
 	free(portpos);
 	exit_conf_mode_ite(port);
 	it8716f_flashport = flashport;
-	if (buses_supported & BUS_SPI)
+	if (internal_buses_supported & BUS_SPI)
 		msg_pdbg("Overriding chipset SPI with IT87 SPI.\n");
 	/* FIXME: Add the SPI bus or replace the other buses with it? */
 	register_spi_programmer(&spi_programmer_it87xx);