m68k: make HPDCA and HPAPCI bools

The only user -- 8250_hp300 -- tests for CONFIG_HPDCA and CONFIG_HPAPCI.
It does not test for *_MODULE variants. That means that if someone sets
the configs to =m, the code is not compiled at all.

There is actually no point having these as tristate. Switch them to
bool.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-m68k@lists.linux-m68k.org
Link: https://lore.kernel.org/r/20250822104208.751191-1-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Jiri Slaby (SUSE)

arch/m68k/Kconfig.devices

@@ -105,14 +105,14 @@ config AMIGA_BUILTIN_SERIAL
 	  To compile this driver as a module, choose M here.
 
 config HPDCA
-	tristate "HP DCA serial support"
+	bool "HP DCA serial support"
 	depends on DIO && SERIAL_8250
 	help
 	  If you want to use the internal "DCA" serial ports on an HP300
 	  machine, say Y here.
 
 config HPAPCI
-	tristate "HP APCI serial support"
+	bool "HP APCI serial support"
 	depends on HP300 && SERIAL_8250
 	help
 	  If you want to use the internal "APCI" serial ports on an HP400