hv: fix error debug message in hcall_set_callback_vector

 this patch is to fix error debug message
 for invalid 'param' case, there is no string
 variable for '%s' output, which will potenially
 trigger hypervisor crash as it may access random
 memroy address and trigger SMAP violation.

Tracked-On: #4092
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>

Author: yonghuah

hypervisor/common/hypercall.c

@@ -1234,7 +1234,7 @@ int32_t hcall_set_callback_vector(const struct acrn_vm *vm, uint64_t param)
 		pr_err("%s: Targeting to service vm", __func__);
 	        ret = -EPERM;
 	} else if ((param > NR_MAX_VECTOR) || (param < VECTOR_DYNAMIC_START)) {
-		pr_err("%s: Invalid passed vector\n");
+		pr_err("%s: Invalid passed vector\n", __func__);
 		ret = -EINVAL;
 	} else {
 		set_vhm_notification_vector((uint32_t)param);