ice: move debugfs code to fwlog

This code is only used in fwlog. Moved it there for easier lib creation.
There is a circular dependency between debugfs and fwlog. Moving to one
file is fixing it.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Author: Michal Swiatkowski

drivers/net/ethernet/intel/ice/ice.h

@@ -905,7 +905,6 @@ static inline bool ice_is_adq_active(struct ice_pf *pf)
 	return false;
 }
 
-void ice_debugfs_fwlog_init(struct ice_fwlog *fwlog, struct dentry *root);
 int ice_debugfs_pf_init(struct ice_pf *pf);
 void ice_debugfs_pf_deinit(struct ice_pf *pf);
 void ice_debugfs_init(void);