hw/dma.c: Fix converting of ioport_register* to MemoryRegion

The commit 582299336879504353e60c7937fbc70fea93f3da introduced a 1-shift for
some offset in dma emulation.

Before the previous commit, which converted ioport_register_* to MemoryRegion,
the DMA controller registered 8 ioports with the following formula:
base + ((8 + i) << d->shift) where 0 <= i < 8
When an IO occured within a Memory Region, DMA callback receives an offset
relative to the started address. Here the started address is:
base + (8 << d->shift).
The offset should be: (i << d->shift). After the shift is reverted, the offset
are 0..7 not 1..8.

Cc: 1089996@bugs.launchpad.net
Reported-by: Andreas Gustafsson <gson@gson.org>
Signed-off-by: Julien Grall <julien.grall@citrix.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
sun4u: Create VGA card after ISA bus

This prepares for changes to VGA I/O port registration.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
xen_platform: Do not use old_portio-style callbacks

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
acpi_piix4: Do not use old_portio-style callbacks

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
[AF: Used HWADDR_PRIx for hwaddr PIIX4_DPRINTF()]
Signed-off-by: Andreas Färber <afaerber@suse.de>