Implement system reset by calling the watchdog soft reset. Following the soft reset, the SoC will reset to the same logic state and therefore have the same effect as a hard (power-on) reset except for: - watchdog scratch registers will be unaffected (hard reset will clear them) - the real time clock will be unaffected BUG=none TEST=tested on Pistachio bring up board Change-Id: I1332c2249c756f6d8574fc5c407de52f88e60f08 Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com> Reviewed-on: https://review.coreboot.org/12755 Tested-by: build bot (Jenkins) Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>