On some devices, e.g. Sony Xperia M4 Aqua, warm reset is used to reboot
device into bootloader and recovery mode.  Instead of always doing hard
reset, add a check on reboot_mode for possible warm reset.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20210714095850.27185-3-shawn.guo@linaro.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>