xen: arm: Do not enable EFI in dom0 since it is not yet supported.

xen: arm: Do not enable EFI in dom0 since it is not yet supported.

Since EFI is not yet supported in dom0, we need to remove the following
properties from the chosen node:

  * linux,uefi-mmap-start
  * linux,uefi-mmap-size
  * linux,uefi-mmap-desc-size
  * linux,uefi-mmap-desc-ver

These are added by "arch/arm/efi/efi-boot.h: fdt_add_uefi_nodes()",
and used by dom0 kernel to enable EFI.

Cc: Julien Grall <julien.grall@linaro.org>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Julien Grall <julien.grall@linaro.org>
Reviewed-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>