[L] Change in em100[main]: Add target/download-RPMC/reset

[Stefan Reinauer (Code Review)]

Attention is currently required from: EvyLiu, Martin L Roth, Stefan Reinauer.

Stefan Reinauer has uploaded a new patch set (#4) to the change originally created by EvyLiu. ( https://review.coreboot.org/c/em100/+/75675?usp=email )

The following approvals got outdated and were removed:
Verified-1 by build bot (Jenkins)

Change subject: Add target/download-RPMC/reset
......................................................................

Add target/download-RPMC/reset

This support is needed for the EM100Pro-G3

Change-Id: Id470fb9022e6472d90f4a9d3b26076a7518803f3
---
M Makefile
A StrToHex.c
M chips.c
M em100.c
M em100.h
M fpga.c
A ini.c
M sdram.c
M spi.c
M system.c
M trace.c
M usb.c
12 files changed, 329 insertions(+), 52 deletions(-)

git pull ssh://review.coreboot.org:29418/em100 refs/changes/75/75675/4