leds: Add HAS_IOPORT dependencies

In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. We thus need to add HAS_IOPORT as dependency for
those drivers using them.

Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230314121216.413434-16-schnelle@linux.ibm.com