configs/qemu_ppc64le_pseries_defconfig: Linux needs host-openssl
Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/7019514688
The kernel build needs host-openssl since commit 9982e0b5a63ca
(configs/qemu: update defconfigs to Linux 6.6.18), so enable it.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>