configs/friendlyarm_nanopi_r2s_defconfig: uboot needs openssl

Fixes the following compile error:

In file included from include/bootm.h:10,
                 from tools/image-host.c:12:
include/image.h:1178:12: fatal error: openssl/evp.h: No such file or directory
 1178 | #  include <openssl/evp.h>
      |            ^~~~~~~~~~~~~~~
compilation terminated.

Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/2103784200

Signed-off-by: Marcus Hoffmann <marcus.hoffmann@othermo.de>
Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

configs/friendlyarm_nanopi_r2s_defconfig

@@ -30,6 +30,7 @@ BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2021.10"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="nanopi-r2s-rk3328"
 BR2_TARGET_UBOOT_NEEDS_DTC=y
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
+BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
 BR2_TARGET_UBOOT_NEEDS_ATF_BL31=y
 BR2_TARGET_UBOOT_NEEDS_ATF_BL31_ELF=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM=y