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>

xen/arch/arm/domain_build.c

@@ -424,12 +424,21 @@ static int write_properties(struct domain *d, struct kernel_info *kinfo,
          *   bootargs (from module #1, above).
          * * remove bootargs,  xen,dom0-bootargs, xen,xen-bootargs,
          *   linux,initrd-start and linux,initrd-end.
+         * * remove bootargs, linux,uefi-system-table,
+         *   linux,uefi-mmap-start, linux,uefi-mmap-size,
+         *   linux,uefi-mmap-desc-size, and linux,uefi-mmap-desc-ver
+         *   (since EFI boot is not currently supported in dom0).
          */
         if ( dt_node_path_is_equal(node, "/chosen") )
         {
             if ( dt_property_name_is_equal(prop, "xen,xen-bootargs") ||
                  dt_property_name_is_equal(prop, "linux,initrd-start") ||
-                 dt_property_name_is_equal(prop, "linux,initrd-end") )
+                 dt_property_name_is_equal(prop, "linux,initrd-end") ||
+                 dt_property_name_is_equal(prop, "linux,uefi-system-table") ||
+                 dt_property_name_is_equal(prop, "linux,uefi-mmap-start") ||
+                 dt_property_name_is_equal(prop, "linux,uefi-mmap-size") ||
+                 dt_property_name_is_equal(prop, "linux,uefi-mmap-desc-size") ||
+                 dt_property_name_is_equal(prop, "linux,uefi-mmap-desc-ver"))
                 continue;
 
             if ( dt_property_name_is_equal(prop, "xen,dom0-bootargs") )