configs: add missing dependencies of Linux on host-openssl

configs: add missing dependencies of Linux on host-openssl

Four defconfigs have Linux kernel configuration that need OpenSSL on
the host, but forgot to express this dependency, causing build
failures. This commit adjusts those defconfigs, fixing the following
defconfig builds:

   imx6ulpico_defconfig
   https://gitlab.com/buildroot.org/buildroot/-/jobs/88314839

   imx7dpico_defconfig
   https://gitlab.com/buildroot.org/buildroot/-/jobs/88314841

   mx51evk_defconfig
   https://gitlab.com/buildroot.org/buildroot/-/jobs/88314847

   orangepi_lite_defconfig
   https://gitlab.com/buildroot.org/buildroot/-/jobs/88314883

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>