since romfs can return the soft link with the kernel change:
commit 67ef70d460db4695b950208d861ff47d4a40bdb3
Author: Xiang Xiao <xiaoxiang@xiaomi.com>
Date: Mon Jul 6 00:34:32 2020 +0800
vfs/dirread: Should return the same file type as lstat
by extend the possible value of d_type for the special file
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>