Staging: sxg: Fix a warning dump emitted by rtnl_watchdog during LTP tests

Fix a softlock warning message thrown up by the rtnl_timer.
This was observed during the LTP tests (interface up/down test)

Signed-off-by: LinSysSoft Sahara Team <saharaproj@linsyssoft.com>
Signed-off-by: Mithlesh Thukral <mithlesh@linsyssoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>