RSS: Improve DMA ICS

Allow references in commands to prevent mistakes due to manual
calculation. Add configurable base addresses and sizes. Zero DTCM
always. Add OTP program to load SAM. Remove second stage OTP loader.
Allocate space in OTP for integrity checker values and SAM config.
Create dedicated program for reset release and remove duplicate reset
release commands. Add documentation for combining ICSes.

Change-Id: Ib3516b1a468946ffba8f366614d050b58e5ce747
Signed-off-by: Raef Coles <raef.coles@arm.com>
26 files changed