feat(qemu): add dummy plat_mboot_measure_key() BL1 function

Adds a dummy implementation of the plat_mboot_measure_key() function in
BL1 for QEMU platform.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Change-Id: I5923aad962a5e34d657cf49c177e68ed2ea93291
1 file changed