target-lm32: add simple disassembler

Because binutils disassembler is based on libopcode, this is a rewrite from
scratch.

Signed-off-by: Michael Walle <michael@walle.cc>
diff --git a/disas.c b/disas.c
index 4945c44..9485824 100644
--- a/disas.c
+++ b/disas.c
@@ -220,6 +220,9 @@
 #elif defined(TARGET_MICROBLAZE)
     disasm_info.mach = bfd_arch_microblaze;
     print_insn = print_insn_microblaze;
+#elif defined(TARGET_LM32)
+    disasm_info.mach = bfd_mach_lm32;
+    print_insn = print_insn_lm32;
 #else
     fprintf(out, "0x" TARGET_FMT_lx
 	    ": Asm output not supported on this arch\n", code);
@@ -421,6 +424,9 @@
 #elif defined(TARGET_S390X)
     disasm_info.mach = bfd_mach_s390_64;
     print_insn = print_insn_s390;
+#elif defined(TARGET_LM32)
+    disasm_info.mach = bfd_mach_lm32;
+    print_insn = print_insn_lm32;
 #else
     monitor_printf(mon, "0x" TARGET_FMT_lx
                    ": Asm output not supported on this arch\n", pc);