Support for SECURITY_MODE attribute in xip_customize.

Change-Id: I0e8516669b996d1ee98da947a23796aa8eb6f13b
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/36401
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <bofferdn@us.ibm.com>
Reviewed-by: SANTOSH BALASUBRAMANIAN <sbalasub@in.ibm.com>
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>
Reviewed-by: Joseph J. McGill <jmcgill@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/36404
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/import/chips/p9/procedures/hwp/customize/p9_xip_customize.C

@@ -83,6 +83,7 @@ fapi2::ReturnCode writeMboxRegs (
     MBOX_ATTR_WRITE (ATTR_RISK_LEVEL,               FAPI_SYSTEM,     i_image);
     MBOX_ATTR_WRITE (ATTR_DISABLE_HBBL_VECTORS,     FAPI_SYSTEM,     i_image);
     MBOX_ATTR_WRITE (ATTR_MC_SYNC_MODE,             i_proc_target,   i_image);
+    MBOX_ATTR_WRITE (ATTR_SECURITY_MODE,            FAPI_SYSTEM,     i_image);
     MBOX_ATTR_SET   (ATTR_PROC_SBE_MASTER_CHIP,     i_proc_target,   i_image);
     MBOX_ATTR_CLEAR (ATTR_PROC_FABRIC_GROUP_ID,     i_proc_target,   i_image);
     MBOX_ATTR_CLEAR (ATTR_PROC_FABRIC_CHIP_ID,      i_proc_target,   i_image);