support/testing: TestATFAllwinner: add missing openssl dependency

The commit [1] updated the u-boot version with the one used by
orangepi_zero_plus2_defconfig but the dependency on openssl
was forgotten.

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/6703221868

[1] eb16148dddc6be39b0d850181c2461fdaba1ee6f

Signed-off-by: Romain Naour <romain.naour@smile.fr>

support/testing/tests/boot/test_atf.py

@@ -19,6 +19,7 @@ class TestATFAllwinner(infra.basetest.BRTest):
         BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2023.10"
         BR2_TARGET_UBOOT_BOARD_DEFCONFIG="orangepi_zero_plus2"
         BR2_TARGET_UBOOT_NEEDS_DTC=y
+        BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
         BR2_TARGET_UBOOT_NEEDS_PYTHON3=y
         BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
         BR2_TARGET_UBOOT_NEEDS_ATF_BL31=y