m68k/atari: ROM port ISA adapter support

Atari ROM port ISA adapter support for EtherNEC and NetUSBee adapters

16 bit access for ROM port adapters follows debugging and
clarification by David Galvez <dgalvez75@gmail.com>. The NetUSBee
ISP1160 USB chip uses these macros.

Signed-off-by: Michael Schmitz <schmitz@debian.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/kernel/setup_mm.c

@@ -381,6 +381,12 @@ void __init setup_arch(char **cmdline_p)
 		isa_sex = 1;
 	}
 #endif
+#ifdef CONFIG_ATARI_ROM_ISA
+	if (MACH_IS_ATARI) {
+		isa_type = ISA_TYPE_ENEC;
+		isa_sex = 0;
+	}
+#endif
 #endif
 }