Zebra: Fix ptm-enable config failure on internally created interfaces

Ticket: CM-15658
Reviewed By: CCR-6534
Testing Done: Unit

Issue: frr ptm-enable command not working for interfaces that have been created by frr as a place holder.

Root Cause: The ptm-enable on interface configuration was not getting stored when the interface was internally created by frr.

Fix: Store the ptm-enable configuration even if the interface is internally created.

Signed-off-by: Radhika Mahankali <radhika@cumulusnetworks.com>

zebra/zebra_ptm.c

@@ -301,6 +301,9 @@ DEFUN (zebra_ptm_enable_if,
 	int old_ptm_enable;
 	int send_linkdown = 0;
 
+	if_data = ifp->info;
+	if_data->ptm_enable = ZEBRA_IF_PTM_ENABLE_UNSPEC;
+
 	if (ifp->ifindex == IFINDEX_INTERNAL) {
 		return CMD_SUCCESS;
 	}
@@ -320,9 +323,6 @@ DEFUN (zebra_ptm_enable_if,
 		}
 	}
 
-	if_data = ifp->info;
-	if_data->ptm_enable = ZEBRA_IF_PTM_ENABLE_UNSPEC;
-
 	return CMD_SUCCESS;
 }