Added initToZero tag for all memory attributes

Change-Id: I88480706f45ca0fe931f182afc895bea904d7a6a
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/25996
Reviewed-by: Brian R. Silver <bsilver@us.ibm.com>
Tested-by: Jenkins Server
Tested-by: Hostboot CI
Reviewed-by: Louis Stermole <stermole@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/69767
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>
Tested-by: Sachin Gupta <sgupta2m@in.ibm.com>