lrdp_v2 : correct total ion memory calculation in memstat.py

Use correct API to calculate the total ion memory allocation.
On 64bit platforms, the amount of memory allocated by ion can
exceed 32 bits.

Change-Id: I3a99392a921a288e3581bb842bb9989bd7c0d696

linux-ramdump-parser-v2/parsers/memstat.py

@@ -90,6 +90,8 @@ class MemStats(RamParser):
         offset_total_allocated = \
             self.ramdump.field_offset(
                 'struct ion_heap', 'total_allocated')
+        size = self.ramdump.sizeof(
+                '((struct ion_heap *)0x0)->total_allocated')
         if self.ramdump.arm64:
             addressspace = 8
         else:
@@ -99,9 +101,12 @@ class MemStats(RamParser):
         for i in range(0, number_of_ion_heaps):
             heap_addr_array.append(heap_addr + i * addressspace)
             temp = self.ramdump.read_word(heap_addr_array[i])
+            if size == 4:
                 total_allocated = self.ramdump.read_int(
-                                temp +
-                                offset_total_allocated)
+                                    temp + offset_total_allocated)
+            if size == 8:
+                total_allocated = self.ramdump.read_u64(
+                                    temp + offset_total_allocated)
             if total_allocated is None:
                 total_allocated = 0
                 break