EDAC/igen6: ecclog_llist can be static

commit 77429eeb upstream.

Fixes: 10590a9d

 ("EDAC/igen6: Add EDAC driver for Intel client SoCs using IBECC")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20201123031850.GA20416@aef56166e5fc
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>