MAINTAINERS: fix paths for relocated files

Several files were renamed in previous commits, causing their entries
in MAINTAINERS to reference outdated paths.
This prevents scripts/get_maintainer.pl from correctly matching
these files to their maintainers.

Update the filenames to reflect their current locations so that
maintainer lookup works properly.

Related commits
---------------

  c45460decbd (Oct 2023)
    hw/input/stellaris_input: Rename to stellaris_gamepad
    Rename  include/hw/input/{gamepad.h => stellaris_gamepad.h}

  4faf359accb (Nov 2020)
    docs: Move virtio-net-failover.rst into the system manual
    Rename  docs/{ => system}/virtio-net-failover.rst

  89857312f32 (Apr 2024)
    hw/usb: move stubs out of stubs/
    Rename  stubs/usb-dev-stub.c => hw/usb/bus-stub.c

  f2604d8508a (Apr 2024)
    hw/virtio: move stubs out of stubs/
    Rename  stubs/virtio-md-pci.c => hw/virtio/virtio-md-stubs.c

  2c888febdfa (Apr 2024)
    memory-device: move stubs out of stubs/
    Rename  stubs/memory_device.c => hw/mem/memory-device-stubs.c

  d481cec7565 (Oct 2024)
    migration: Move cpu-throttle.c from system to migration
    Rename  {system => migration}/cpu-throttle.c

  864a3fa4392 (Jan 2023)
    monitor: Rename misc.c to hmp-target.c
    Rename  monitor/{misc.c => hmp-target.c}

Signed-off-by: Sean Wei <me@sean.taipei>
Message-ID: <374597a7-94e4-45b2-9617-35183db3ea9d@sean.taipei>
Signed-off-by: Thomas Huth <thuth@redhat.com>
1 file changed