vconsole: don't parse Fedora's KEYMAP= kernel parameters anymore

vconsole: don't parse Fedora's KEYMAP= kernel parameters anymore

KEYMAP are use to pass keymap configuration to initrd, but not to the
system itself. Since the initrd might get out of date we need to make
sure that changes made in userspace override the settings from the
cmdline, hence drpo any use of it all for these variables.