COSE: Add COSE_Mac0 support in t_cose library

Add t_cose_mac0_init() and t_cose_mac0_finish() to complete
COSE_Mac0 structure.
Implement HMAC operations for COSE_Mac0 based on PSA crypto MAC
operations.

Change-Id: Ic55a34d24100adb1c839b0d3ff7cb4d2da09d4cb
Signed-off-by: David Hu <david.hu@arm.com>
10 files changed