FROMLIST: cfi: enable sanitize for cfi.c

currenly,cfi.c is excluded from cfi sanitize because of cfi handler.
The side effect is that we can not transfer function pointer to
other files which enable cfi sanitize.

Enable cfi sanitize for cfi.c and bypass cfi check for __cfi_slowpath_diag

Change-Id: Id026c6becf074eb828e4b3d642ab791d6cedf82c
Signed-off-by: Haibo Li <haibo.li@mediatek.com>
Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
Link: https://lore.kernel.org/lkml/20220704014046.34596-2-haibo.li@mediatek.com/


Bug: 236922027
Bug: 257362811
[ Sami: Fixed ABI changes ]
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>