Add sh2 to list of known architectures.

gdb/sh-tdep.c

@@ -105,6 +105,10 @@ sh_processor_type_table[] =
     sh_reg_names, bfd_mach_sh
   }
   ,
+  {
+    sh_reg_names, bfd_mach_sh2
+  }
+  ,
   {
     sh3_reg_names, bfd_mach_sh3
   }