f2fs: make "f2fs_fault_name[]" const char *

Those strings are immutable.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2 files changed