HW File Based Encryption (FBE) uses Crypto Engine to
encrypt the user data with unique key for each file.
File name and data both are encrypted with this feature.
1. security/pfk: New module to support per file
encryption using CE.
2. fs/ext4: changes made to support using crypto engine
to encyrpt the data.
Other changes made to provide support framework for per
file encryption.
Change-Id: Idea3f6f8bf954c60c3c6caa3d9b048d87fcacbe4
Signed-off-by: Dinesh K Garg <dineshg@codeaurora.org>