hw/vmapple: include missing headers

Disablement by default led to:

../hw/vmapple/vmapple.c:276:39: error: use of undeclared identifier 'GTIMER_VIRT'
  276 |         qdev_connect_gpio_out(cpudev, GTIMER_VIRT,
      |                                       ^
../hw/vmapple/vmapple.c:479:54: error: use of undeclared identifier 'QEMU_PSCI_CONDUIT_HVC'
  479 |         object_property_set_int(cpu, "psci-conduit", QEMU_PSCI_CONDUIT_HVC,
      |                                                      ^
../hw/vmapple/vmapple.c:556:13: error: call to undeclared function 'arm_build_mp_affinity'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  556 |             arm_build_mp_affinity(n, GICV3_TARGETLIST_BITS);
      |             ^
3 errors generated.

pretty quickly.

Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20251007203153.30136-2-mohamed@unpredictable.fr>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>