ANDROID: trusty: Separate out SMC based transport

This commit refactors SMC based transport operation like
smc_fastcalls, smc memory operations in a separate file.

Bug: 283822781
Test: Build & boot Trusty
Signed-off-by: Arunachalam Ganapathy <[email protected]>
Signed-off-by: Andrei Homescu <[email protected]>
Change-Id: Iebee505b7172f6247186e3bf1e0b50740b2e4dfa
7 files changed