LU-9679 modules: declare zero-arg functions correctly

LU-9679 modules: declare zero-arg functions correctly

Functions that don't take any arguments should be
declared
   return-type name(void)
rather than
   return-type name()

This patch only changes functions that are included in
kernel modules.

Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I327c57131c4b5008660844a8436fa27df53c16c7
Reviewed-on: https://review.whamcloud.com/36672
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Chris Horn <hornc@cray.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Tested-by: Maloo <maloo@whamcloud.com>