fm10k: move fm10k_prepare_for_reset and fm10k_handle_reset

A future patch needs these functions defined earlier in the file. Move
them closer to above where they will be called.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>