configs/qemu_ppc64_pseries_defconfig: Linux needs host-openssl

Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/7019514677

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>

configs/qemu_ppc64_pseries_defconfig

@@ -23,6 +23,7 @@ BR2_LINUX_KERNEL_CUSTOM_VERSION=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.6.18"
 BR2_LINUX_KERNEL_DEFCONFIG="pseries"
 BR2_LINUX_KERNEL_VMLINUX=y
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF=y
 
 # host-qemu for gitlab testing