This patch fixes two issues:
o The CONFIG_MODVERSIONING=y case broke at compile time since some
  functions were not updated with the latest module changes
o Exporting symbols from modules stopped working due to confusion of
  mod->num_syms and mod->num_ksyms. Rename mod->num_ksyms to mod->num_syms,
  which is more logical since the associated array is called ->syms, and
  for the kallsyms member use "num_symtab", since the associated array is
  ->symtab.