iwlwifi: remove forward debugfs function declarations

There's no need to have 'forward' debugfs function declarations
as part of the macros because the macros are always used after
the static functions are defined already, so remove them.

Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>

diff --cc drivers/net/wireless/iwlwifi/dvm/debugfs.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/pcie/trans.c
Simple merge