configs/kontron_smarc_sal28: add BR2_TARGET_UBOOT_NEEDS_OPENSSL

Uboot host tools require openssl. So enable BR2_TARGET_UBOOT_NEEDS_OPENSSL.

Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/3267233835

Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

configs/kontron_smarc_sal28_defconfig

@@ -27,6 +27,7 @@ BR2_TARGET_UBOOT_BOARD_DEFCONFIG="kontron_sl28"
 BR2_TARGET_UBOOT_NEEDS_DTC=y
 BR2_TARGET_UBOOT_NEEDS_PYTHON3=y
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
+BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
 BR2_TARGET_UBOOT_NEEDS_UTIL_LINUX=y
 BR2_TARGET_UBOOT_NEEDS_GNUTLS=y
 # BR2_TARGET_UBOOT_FORMAT_BIN is not set