efi_loader: use EfiBootServicesData for DP to text

Memory allocated in the implementation of the
EFI_DEVICE_PATH_TO_TEXT_PROTOCOL must be of type EfiBootServicesData.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/lib/efi_loader/efi_device_path_to_text.c b/lib/efi_loader/efi_device_path_to_text.c
index d46327a..57fa9d9 100644
--- a/lib/efi_loader/efi_device_path_to_text.c
+++ b/lib/efi_loader/efi_device_path_to_text.c
@@ -34,7 +34,7 @@
 	efi_status_t ret;
 
 	len = sizeof(u16) * (utf8_utf16_strlen(str) + 1);
-	ret = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, len, (void **)&out);
+	ret = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, len, (void **)&out);
 	if (ret != EFI_SUCCESS)
 		return NULL;
 	dst = out;