MAINTAINERS: Fix up F: entry bit rot

MAINTAINERS: Fix up F: entry bit rot

include/hw/xilinx.h is gone since commit d5001cf, drop.

include/hw/*/xlnx*.c is a typo, change .c to .h.

include/hw/acpi/piix.h is a typo, change piix.h to piix4.h.

hw/i386/*dsl and scripts/acpi*py are gone since since commit 9fc6502,
drop.

hw/virtio/dataplane/* are gone since commit fee089e, drop.

ICC Bus is gone since commit dfeb867, drop.

block/raw-aio.h was moved to include/block/raw-aio.h in commit
0187f5c, update.

Tracked down with

    for i in `grep "^[FX]: " MAINTAINERS | sed "s/^.: //"`
    do if [ ! -e "$i" ]; then echo "$i"; fi
    done

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>