power: reset: force warm_reset for thermal shutdown

Also, remove shadow variable reboot_mode from exynos_reboot_mode_set.

Bug: 232092738
Bug: 231628393
Change-Id: I2265e683c3a4b1003d1fea48c463eca3bedd9af9
Signed-off-by: Oleg Matcovschi <omatcovschi@google.com>
(cherry picked from commit 6f235f990267f424191b52bc7fd750732f9080d3)
2 files changed