ext4 crypto: teach ext4_htree_store_dirent() to store decrypted filenames

For encrypted directories, we need to pass in a separate parameter for
the decrypted filename, since the directory entry contains the
encrypted filename.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --cc fs/ext4/dir.c
Simple merge

diff --cc fs/ext4/ext4.h
Simple merge

diff --cc fs/ext4/inline.c
Simple merge

diff --cc fs/ext4/namei.c
Simple merge