Exynos serial: fix assertion side effection during serial configuration
Exynos serial: fix assertion side effection during serial configuration

seL4/libplatsupport,winksaville/libplatsupport,seL4/libplatsupport,agacek/util_libs,winksaville/libplatsupport,agacek/util_libs,agacek/libplatsupport,agacek/libplatsupport,agacek/util_libs,agacek/util_libs