speakup: add HAS_IOPORT dependency for SPEAKUP_SERIALIO

In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. SPEAKUP_SERIALIO thus needs to depend on HAS_IOPORT.

Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
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>
Link: https://lore.kernel.org/r/20230522105049.1467313-34-schnelle@linux.ibm.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/accessibility/speakup/Kconfig

@@ -46,6 +46,7 @@ if SPEAKUP
 config SPEAKUP_SERIALIO
 	def_bool y
 	depends on ISA || COMPILE_TEST
+	depends on HAS_IOPORT
 
 config SPEAKUP_SYNTH_ACNTSA
 	tristate "Accent SA synthesizer support"