Add new case for hpt guest with huge page backend

ID: 1839601,1839603
Signed-off-by: Nmdeng@redhat.com <mdeng@redhat.com>

qemu/tests/cfg/hpt.cfg

@@ -6,6 +6,7 @@
     no Host_RHEL.6
     no RHEL.5 RHEL.6
     only pseries
+    machine_type_extra_params = "max-cpu-compat=power8"
     variants:
         - increase_reboot:
             sub_type = "increase_reboot"
@@ -25,3 +26,13 @@
         - negative:
             sub_type = "negative"
             increment_sequence = "-20 -25 -30 -100 20 30 100"
+        - with_huge_page:
+            setup_hugepages = yes
+            extra_params += " -mem-path /mnt/kvm_hugepage"
+            variants:
+                - increase:
+                    sub_type = "huge_page_increase"
+                    increment_sequence = "1"
+                - reduce:
+                    sub_type = "huge_page_reduce"
+                    increment_sequence = "1 -1 1 -1"