kgdb: add HAS_IOPORT dependency

In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at
compile time.  We thus need to add HAS_IOPORT as dependency for those
drivers using them.

Link: https://lkml.kernel.org/r/20240403132547.762429-2-schnelle@linux.ibm.com


Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>