Not sure if this has to be fixed in pcmcia code or our omap_cf.c, but
with patch in attachment I now get:
=> Instert CF card into OSK:
# hda: TOSHIBA THNCF256MDG, CFA DISK drive
ide0 at 0xc2852000-0xc2852007,0xc285200e on irq 222
hda: max request size: 128KiB
hda: 500736 sectors (256 MB) w/2KiB Cache, CHS=978/16/32
hda: cache flushes not supported
    hda: hda1
ide-cs: hda: Vcc = 3.3, Vpp = 0.0
# mount -t vfat /dev/hda1 /mount
    hda: hda1
#