xsm: clean up unneeded current references

Some XSM hooks in dummy.h used current->domain when this was also passed
as a parameter; use the parameter in these cases. There are two hooks
where this does not apply and which are not immediately obvious:
xsm_set_target's parameters are the device model and HVM domains, and
xsm_mem_sharing_op's first parameter is the source of the shared page,
not the domain making the hypercall.

Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>

xen/include/xsm/dummy.h

@@ -231,7 +231,7 @@ static XSM_INLINE int xsm_console_io(XSM_DEFAULT_ARG struct domain *d, int cmd)
 static XSM_INLINE int xsm_profile(XSM_DEFAULT_ARG struct domain *d, int op)
 {
     XSM_ASSERT_ACTION(XSM_HOOK);
-    return xsm_default_action(action, current->domain, NULL);
+    return xsm_default_action(action, d, NULL);
 }
 
 static XSM_INLINE int xsm_kexec(XSM_DEFAULT_VOID)
@@ -281,7 +281,7 @@ static XSM_INLINE void xsm_evtchn_close_post(struct evtchn *chn)
 static XSM_INLINE int xsm_evtchn_send(XSM_DEFAULT_ARG struct domain *d, struct evtchn *chn)
 {
     XSM_ASSERT_ACTION(XSM_HOOK);
-    return xsm_default_action(action, current->domain, NULL);
+    return xsm_default_action(action, d, NULL);
 }
 
 static XSM_INLINE int xsm_evtchn_status(XSM_DEFAULT_ARG struct domain *d, struct evtchn *chn)