[Coverity CID :187079] Integer handling issues in /subsys/net/l2/ethernet/gptp/gptp.c

[mandarcthorat1]

Static code scan issues seen in File: /subsys/net/l2/ethernet/gptp/gptp.c
Category: Integer handling issues
Function: gptp_set_time_itv
Component: Networking
CID: 187079
Please fix or provide comments to square it off in coverity in the link: https://scan9.coverity.com/reports.htm#v32951/p12996

[mandarcthorat1]

The problem is detected again by latest coverity scan. Please have a look

[jukkar]

I wonder why coverity is reporting this now instead of immediately after the previous fix was reported. Anyway, investigating.