uboot-imx

optee: support routing of rpmb data frames to mmc

Adds support in optee supplicant to route signed (MACed) RPMB frames
from OP-TEE Secure OS to MMC and vice versa to manipulate the RPMB
partition.

Tested-by: Igor Opaniuk <igor.opaniuk@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>