lrdp_v2: Fix lpm cpu_possible_bits for kernel 4.9

cpu_possible_bits / cpu_online_bits are not available at kernel 4.9
replace them with __cpu_possible/online_mask

Change-Id: I672798f27c24991230d31698e4d318a8af56c443

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

@@ -27,6 +27,8 @@ class lpm(RamParser):
     def get_bits(self):
         bits_addr = self.ramdump.address_of('cpu_possible_bits')
         if bits_addr is None:
+            bits_addr = self.ramdump.address_of('__cpu_possible_mask')
+            if bits_addr is None:
                 self.output.append("NOTE: 'cpu_possible_bits' not found")
                 return
 
@@ -39,6 +41,8 @@ class lpm(RamParser):
 
         bits_addr = self.ramdump.address_of('cpu_online_bits')
         if bits_addr is None:
+            bits_addr = self.ramdump.address_of('__cpu_online_mask')
+            if bits_addr is None:
                 self.output.append("NOTE: 'cpu_online_bits' not found")
                 return