ArmVirtPkg: install EdkiiPlatformHasDeviceTree proto in the 32-bit builds

ArmVirtPkg: install EdkiiPlatformHasDeviceTree proto in the 32-bit builds

Include XenPlatformHasAcpiDtDxe and PlatformHasAcpiDtDxe in the 32-bit
builds too.

Please see https://bugzilla.tianocore.org/show_bug.cgi?id=524
why it is needed. With this patch my arm uefi VM boots.

Fixes: 3a2c1548fe2df4b0b067671e2025da6372063218
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Nerijus Baliūnas <nerijus@users.sourceforge.net>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
[lersek@redhat.com: move long subj to commit msg body, add short subj]
[lersek@redhat.com: add Fixes reference]
[lersek@redhat.com: keep ACPI DXE modules grouped in QEMU DSCs]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>