iavf: simplify watchdog_task in terms of adminq task scheduling

Simplify the decision whether to schedule adminq task. The condition is
the same, but it is executed in more scenarios.

Note that movement of watchdog_done label makes this commit a bit
surprising. (Hence not squashing it to anything bigger).

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>