refactor(measured-boot): update event log hash alg

Updating the TPM_HASH_ALG to reflect the new name for the Event Log hash
algorithm MBOOT_EL_HASH_ALG.

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: Ib28fced3065917fb46f7ed155f6512cf364cc281
5 files changed