firmware: qcom_smc: Add compatibility layer for qseecom

Adding a compatibility layer so that only header changes are required
for qseecom. This change will exist only for Lahaina bring up.

Change-Id: I5b69dd02491416e4b593c42c85a2ffcf97280020
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Signed-off-by: Elliot Berman <eberman@codeaurora.org>