MA-17387 Remove the rpmb handle flag in hwcrypto

MA-17387 Remove the rpmb handle flag in hwcrypto

The handle_rpmb flag should indicate whether the call will invoke
RPMB callbacks, which has been removed by below commit:
  commit dfd911856d31fd91eb4e3c1edb1d691723c6edaf
  Author: Roberto Pereira <rpere@google.com>
  Date:   Thu Nov 2 15:09:20 2017 -0700

      ql-tipc: trusty_ipc: Change ipc polling to be per device

      This allows ipc devices to provide service callbacks (e.g. rpmb) transparently
      to the application instead of needing to have prior knowledge of the expected
      request and having to poll the individual services' channels separately.

      Change-Id: I3257ae5e429f4a0c279f070d750b56c5600c38d5

Sync the change for hwcrypto, it will help remove some build warnings.

Test: builds and boots with trusty.

Signed-off-by: Ji Luo <ji.luo@nxp.com>
Change-Id: I696b13d9d509d5983c934df5ee6fb36e46f4c884
(cherry picked from commit 8812d39018c23cc26afa43a97acf27427979c90c)
(cherry picked from commit e79c079bd3f10d4fd80d33edeae184d53f80f706)