ISDIMM - compile fix

  Add the isdimm cpp file to vpd-manager meson
  Fix namespace for isdimm

Change-Id: I2620dc51f5674b9261aa95720def235b24b97ed2
Signed-off-by: jinuthomas <jinu.joy.thomas@in.ibm.com>
diff --git a/vpd-parser/isdimm_vpd_parser.hpp b/vpd-parser/isdimm_vpd_parser.hpp
index cbcb1d5..9d6cca8 100644
--- a/vpd-parser/isdimm_vpd_parser.hpp
+++ b/vpd-parser/isdimm_vpd_parser.hpp
@@ -8,7 +8,7 @@
 {
 namespace vpd
 {
-namespace memory
+namespace isdimm
 {
 namespace parser
 {
@@ -148,6 +148,6 @@
 }
 
 } // namespace parser
-} // namespace memory
+} // namespace isdimm
 } // namespace vpd
 } // namespace openpower