public/domctl: drop unnecessary typedefs and handles

By virtue of the struct xen_domctl container structure, most of them
are really just cluttering the name space.

While doing so,
- convert an enum typed (pt_irq_type_t) structure field to a fixed
  width type,
- make x86's paging_domctl() and descendants take a properly typed
  handle,
- add const in a few places.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Acked-by: Dario Faggioli <dario.faggioli@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Meng Xu <mengxu@cis.upenn.edu>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Julien Grall <julien.grall@arm.com>
Acked-by: George Dunlap <george.dunlap@citrix.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>

tools/libxc/include/xenctrl.h

@@ -903,7 +903,7 @@ int xc_vcpu_get_extstate(xc_interface *xch,
                          uint32_t vcpu,
                          xc_vcpu_extstate_t *extstate);
 
-typedef xen_domctl_getvcpuinfo_t xc_vcpuinfo_t;
+typedef struct xen_domctl_getvcpuinfo xc_vcpuinfo_t;
 int xc_vcpu_getinfo(xc_interface *xch,
                     uint32_t domid,
                     uint32_t vcpu,
@@ -916,7 +916,7 @@ long long xc_domain_get_cpu_usage(xc_interface *xch,
 int xc_domain_sethandle(xc_interface *xch, uint32_t domid,
                         xen_domain_handle_t handle);
 
-typedef xen_domctl_shadow_op_stats_t xc_shadow_op_stats_t;
+typedef struct xen_domctl_shadow_op_stats xc_shadow_op_stats_t;
 int xc_shadow_control(xc_interface *xch,
                       uint32_t domid,
                       unsigned int sop,