ide: fix Falcon IDE breakage

[m68k] Falcon IDE: always serialize, in order to force execution of
       ide_get_lock() and friends.

Signed-off-By: Michael Schmitz <schmitz@debian.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
[bart: set flag in falconide_port_info instead of falconide_init()]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>