Allow PRL update via OMA-DM.

BUG=chrome-os-partner:16216
TEST=Sprint sent commands to device and verified new PRL

Change-Id: I8bcf352ae95367ef5f57b51b1e9abdb5e917315d
Reviewed-on: https://gerrit.chromium.org/gerrit/45246
Reviewed-by: Arman Uguray <armansito@chromium.org>
Commit-Queue: Thieu Le <thieule@chromium.org>
Tested-by: Thieu Le <thieule@chromium.org>
diff --git a/gobi_cdma_modem.cc b/gobi_cdma_modem.cc
index 898a719..5673ec5 100644
--- a/gobi_cdma_modem.cc
+++ b/gobi_cdma_modem.cc
@@ -499,6 +499,11 @@
   ULONG rc;
   LOG(INFO) << "Activating OMA-DM";
 
+  rc = sdk_->OMADMSetPRLUpdateFeature(TRUE);
+  if (rc != 0) {
+    LOG(ERROR) << "OMA-DM activation failed to enable PRL update: " << rc;
+    return MM_MODEM_CDMA_ACTIVATION_ERROR_START_FAILED;
+  }
   rc = sdk_->OMADMStartSession(gobi::kConfigure);
   if (rc != 0) {
     LOG(ERROR) << "OMA-DM activation failed: " << rc;