crypto: Remove crypto block device from encryption path

Crypto block device created using request based device
mapper layer is not required for ICE based HW FDE since
data is encrypted inline.

Change-Id: I4ed0baf7191a1775f5c7971c5e9d2ccd630febf9
Signed-off-by: Neeraj Soni <neersoni@codeaurora.org>