Revert "pfk: keymaster support to set/clear ice keys"

This reverts commit cd1be5fa.

Reverting to have FBE in sync with upstream implementation.

Change-Id: I21d84211c0469d1a4b3d8685033a64cc04854109
Signed-off-by: Shivaprasad Hongal <shongal@codeaurora.org>