sh4 disasm fixes

Add the sh4 target to the monitor disassembly function,
and remove a duplicate "0x" printout from the sh4 dis-
assembly code.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
diff --git a/disas.c b/disas.c
index ce342bc..f7bcce7 100644
--- a/disas.c
+++ b/disas.c
@@ -393,6 +393,9 @@
 #else
     print_insn = print_insn_little_mips;
 #endif
+#elif defined(TARGET_SH4)
+    disasm_info.mach = bfd_mach_sh4;
+    print_insn = print_insn_sh;
 #else
     monitor_printf(mon, "0x" TARGET_FMT_lx
                    ": Asm output not supported on this arch\n", pc);