efi_loader: enable UEFI variables at runtime

Enable UEFI variables at runtime.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 5b6506f..91a4551 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -121,6 +121,8 @@
 	rt_table->version = EFI_RT_PROPERTIES_TABLE_VERSION;
 	rt_table->length = sizeof(struct efi_rt_properties_table);
 	rt_table->runtime_services_supported =
+				EFI_RT_SUPPORTED_GET_VARIABLE |
+				EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME |
 				EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP |
 				EFI_RT_SUPPORTED_CONVERT_POINTER;