ethtool: Update to version 5.15

ethtool: Update to version 5.15

- Update from 5.13 to 5.15
- Update of rootfile not required
- Changelog
   Release version 5.15	Michal Kubecek
    update UAPI header copies	Michal Kubecek
    netlink: settings: Correct duplicate condition	Bastian Germann
    Merge branch 'review/module-fixes-2-v2'	Michal Kubecek
    sff-8636: Remove extra blank lines	Ido Schimmel
    sff-8636: Convert if statement to switch-case	Ido Schimmel
    sff-8636: Fix incorrect function name	Ido Schimmel
    sff-8636: Remove incorrect comment	Ido Schimmel
    cmis: Correct comment	Ido Schimmel
    cmis: Fix wrong define name	Ido Schimmel
    cmis: Fix CLEI code parsing	Ido Schimmel
    Merge branch 'review/module-fixes' into master	Michal Kubecek
    netlink: eeprom: Fix compilation when pretty dump is disabled	Ido Schimmel
    ethtool: Fix compilation warning when pretty dump is disabled	Ido Schimmel
    netlink: eeprom: Fallback to IOCTL when a complete hex/raw dump is requested	Ido Schimmel
    cmis: Fix invalid memory access in IOCTL path	Ido Schimmel
    sff-8636: Fix parsing of Page 03h in IOCTL path	Ido Schimmel
    Merge branch 'next' into master	Michal Kubecek
   Release version 5.14	Michal Kubecek
    netlink: settings: add netlink support for coalesce cqe mode parameter	Yufeng Mo
    pretty: update message descriptions for coalescing	Michal Kubecek
    netlink: settings: add two link extended substates of bad signal integrity	Guangbin Huang
    update UAPI header copies	Michal Kubecek
    pretty: add message descriptions for PHC virtual clocks	Michal Kubecek
    pretty: add message descriptions for FEC stats	Michal Kubecek
    pretty: reorder to match enum values	Michal Kubecek
    update UAPI header copies	Michal Kubecek
    cmdline: skip dummy args entry in find_option()	Michal Kubecek
    Merge branch 'review/nojson-fail' into master	Michal Kubecek
    ethtool: return error if command does not support --json	Jakub Kicinski
    ethtool: use dummy args[] entry for no-args case	Jakub Kicinski
    ethtool: remove questionable goto   Jakub Kicinski
    Remove trailing newline in perror messages  Jules Maselbas

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>