product/tc2: Add support for TC2/RSS boot flow
Created by: tintuthomas-arm
Add TC2 BL1 module that implements the boot flow, with MHU (doorbell) signalling to/from RSS.
BL1 will signal the RSS to indicate that startup is complete, then wait for another signal from RSS before powering on the AP CPUs.
Signed-off-by: Anders Dellien anders.dellien@arm.com Change-Id: I2747bd0d07e867764c9a498ae87a985f4b6b7035