*: use get_console_fd() as appropriate, and make it fail on open error -

*: use get_console_fd() as appropriate, and make it fail on open error -
 get_console_fd_or_die().

function                                             old     new   delta
get_console_fd_or_die                                  -     163    +163
loadkmap_main                                        211     201     -10
loadfont_main                                        440     430     -10
dumpkmap_main                                        218     208     -10
kbd_mode_main                                        158     146     -12
setkeycodes_main                                     156     143     -13
get_console_fd                                       163       -    -163
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(add/remove: 1/1 grow/shrink: 0/5 up/down: 163/-218)          Total: -55 bytes