mmc: sdhci-msm-ice: add support for FBE over F2FS

Add support for FBE to work with F2FS filesystem on eMMC
based devices.  For F2FS+FBE on eMMC, the cryto data unit
size (CDU size) should be 4KB as F2FS encrypts/decrypts
the data at min. 4KB blocks with (inode|pgidx) as it's
corresponding data unit number (DUN).

Change-Id: I797d896e4a7fbd26fd5f02a1682b9c1d77f68fb6
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>