Revert "comedi: add HAS_IOPORT dependencies"

This reverts commit b5c75b6.

The commit makes it impossible to select configuration options that
depend on COMEDI_8254, COMEDI_DAS08, COMEDI_NI_LABPC, or
COMEDI_AMPLC_DIO200 options due to changing 'select' directives to
'depends on' directives and there being no other way to select those
codependent configuration options.

Fixes: b5c75b6 ("comedi: add HAS_IOPORT dependencies")
Cc: Niklas Schnelle <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: <[email protected]> # v6.5+
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Ian Abbott <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>