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