Double the NVDIMM_READY timeout to prevent erroneous error

NVDIMM controller POR or firmware induced reset time may vary
from run-to-run. Doubling the timeout here in case of edge
condition.

Change-Id: I717dfbef9b2903e8bb1e7aed92c28df1fab90033
CQ:SW476597
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/84107
Reviewed-by: Matt Derksen <mderkse1@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Corey V Swenson <cswenson@us.ibm.com>
Reviewed-by: Daniel M Crowell <dcrowell@us.ibm.com>

src/usr/isteps/nvdimm/nvdimm.C

@@ -494,8 +494,8 @@ errlHndl_t nvdimmReady(Target *i_nvdimm)
             break;
         }
 
-        // Convert to ms for polling
-        uint32_t l_nvm_init_time_ms = l_nvm_init_time * MS_PER_SEC;
+        // Convert to ms for polling and double the value to avoid edge condition
+        uint32_t l_nvm_init_time_ms = l_nvm_init_time * MS_PER_SEC * 2;
         uint32_t l_poll = 0;
 
         do