binfmt_elf: replace IS_ERR() with IS_ERR_VALUE()

Avoid typecasts that are needed for IS_ERR() and use IS_ERR_VALUE()
instead.

Signed-off-by: Bo Liu <liubo03@inspur.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221115031757.2426-1-liubo03@inspur.com