iavf: fix reset_task for early reset event

If a reset event is received from the PF early in the init cycle, the
state machine hangs for about 25 seconds.

Reproducer:
  echo 1 > /sys/class/net/$PF0/device/sriov_numvfs
  ip link set dev $PF0 vf 0 mac $NEW_MAC

The log shows:
  [792.620416] ice 0000:5e:00.0: Enabling 1 VFs
  [792.738812] iavf 0000:5e:01.0: enabling device (0000 -> 0002)
  [792.744182] ice 0000:5e:00.0: Enabling 1 VFs with 17 vectors and 16 queues per VF
  [792.839964] ice 0000:5e:00.0: Setting MAC 52:54:00:00:00:11 on VF 0. VF driver will be reinitialized
  [813.389684] iavf 0000:5e:01.0: Failed to communicate with PF; waiting before retry
  [818.635918] iavf 0000:5e:01.0: Hardware came out of reset. Attempting reinit.
  [818.766273] iavf 0000:5e:01.0: Multiqueue Enabled: Queue pair count = 16

Fix it by scheduling the reset task and making the reset task capable of
resetting early in the init cycle.

Fixes: ef8693eb ("i40evf: refactor reset handling")
Signed-off-by: Ahmed Zaki <ahmed.zaki@intel.com>
Tested-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>