staging: r8188eu: correct set/defined but unused warnings from debug cleanup

The recent include/odm_debug.h removal series caused a few kernel test
robot warnings. This patch fixes them as well as an existing warning
related to an array within include/rtw_security.h not being used.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210731133804.196631-1-phil@philpotter.co.uk


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>